BoardQBank • NPLEX Part II Core Clinical Science Preparation
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NPLEX Part II · Module 01

Physical & Clinical Diagnosis

Upgraded case-based practice focused on clinically relevant history, examination, diagnostic synthesis, red flags, safety, and referral. The module uses the current four-response, single-best-answer format.

50Clinical cases
260Questions
4Response options
65 eachA–D answer balance
Educational use: This independent BoardQBank resource is not affiliated with NABNE or NPLEX. All items are marked pretest and require formal subject-matter-expert and psychometric review before scored or high-stakes use.
Diagnosis GEAPhysical & Clinical Diagnosis SEA
Exact balanceA 65 · B 65 · C 65 · D 65
Server checkedAnswer keys and rationales are not delivered in the initial page HTML.
Structured reviewCompetency, difficulty, safety priority, rationale, and references.
0 / 260 answered
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1

Acute Coronary Syndrome

4 questions · History, Examination & Clinical Reasoning

GEA: DiagnosisSEA: Physical & Clinical Diagnosis
Clinical case
Patient profile A 58-year-old woman presents with 40 minutes of pressure-like discomfort in the upper abdomen and lower chest. The symptoms began while she was carrying groceries upstairs. She reports nausea, sweating, unusual fatigue and mild shortness of breath. Medical history ● Type 2 diabetes mellitus ● Hypertension ● Dyslipidemia Medications ● Metformin ● Losartan ● Atorvastatin Vital signs ● Temperature: 36.8°C ● Blood pressure: 154/92 mmHg ● Heart rate: 102/min ● Respiratory rate: 22/min ● Oxygen saturation: 94% on room air Physical examination The patient appears anxious and diaphoretic. Cardiac rhythm is regular. Lungs are clear. The discomfort is not reproduced by chest-wall palpation.
Question 1 of 4NPLEX-PCD-001

Which additional history question is most important?

Answer and clinical rationale

References

    Question 2 of 4NPLEX-PCD-002

    What is the most likely diagnosis?

    Answer and clinical rationale

    References

      Question 3 of 4NPLEX-PCD-003

      Which finding would most strongly suggest aortic dissection rather than acute coronary syndrome?

      Answer and clinical rationale

      References

        Question 4 of 4NPLEX-PCD-004

        What is the most appropriate immediate action?

        Next case

        Answer and clinical rationale

        References

          Open case review, differentials, clinical sequence, or NPLEX trap
          NPLEX trap Do not diagnose reflux, anxiety or musculoskeletal pain before excluding myocardial ischemia in a patient with compatible symptoms and cardiovascular risk factors. Case overview The essential sequence is: Recognize an anginal equivalent → identify cardiovascular risk → prioritize acute coronary syndrome → activate emergency care.

          Reference framework

          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
          3. American College of Cardiology/American Heart Association. Current acute coronary syndrome guideline.
          2

          Pulmonary Embolism

          4 questions · History, Examination & Clinical Reasoning

          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
          Clinical case
          Patient profile A 34-year-old woman presents with sudden shortness of breath and right-sided pleuritic chest pain. She returned from a 10-hour flight two days ago. Medical history ● No previous cardiopulmonary disease ● No recent infection Medications ● Combined estrogen-progestin oral contraceptive Vital signs ● Temperature: 37.2°C ● Blood pressure: 108/68 mmHg ● Heart rate: 118/min ● Respiratory rate: 28/min ● Oxygen saturation: 90% on room air Physical examination Breath sounds are equal bilaterally. The right calf is swollen and tender and measures 3 cm larger than the left calf.
          Question 1 of 4NPLEX-PCD-005

          Which historical feature most increases this patient’s risk?

          Answer and clinical rationale

          References

            Question 2 of 4NPLEX-PCD-006

            What is the most likely diagnosis?

            Answer and clinical rationale

            References

              Question 3 of 4NPLEX-PCD-007

              Which examination finding would make tension pneumothorax more likely?

              Answer and clinical rationale

              References

                Question 4 of 4NPLEX-PCD-008

                What is the most appropriate next step?

                Next case

                Answer and clinical rationale

                References

                  Open case review, differentials, clinical sequence, or NPLEX trap
                  NPLEX trap A normal or nearly normal lung examination does not exclude pulmonary embolism. Case overview The diagnostic pattern is: Venous thromboembolism risk + unilateral leg findings + sudden pleuritic symptoms + hypoxemia.

                  Reference framework

                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                  3. American Heart Association/American College of Cardiology. Current guidance for acute pulmonary embolism and venous thromboembolism.
                  3

                  Acute Ischemic Stroke

                  4 questions · History, Examination & Clinical Reasoning

                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                  Clinical case
                  Patient profile A 69-year-old man develops sudden difficulty speaking and weakness of the right arm while eating breakfast. His spouse states that he was normal 35 minutes earlier. Medical history ● Hypertension ● Atrial fibrillation ● Type 2 diabetes mellitus Medications ● Metformin ● Amlodipine ● The patient stopped taking his anticoagulant two months ago Vital signs ● Temperature: 36.7°C ● Blood pressure: 182/98 mmHg ● Heart rate: 106/min, irregularly irregular ● Respiratory rate: 18/min ● Oxygen saturation: 96% Physical examination The patient has right facial droop, right-arm weakness and expressive aphasia.
                  Question 1 of 4NPLEX-PCD-009

                  Which historical information is most important to establish immediately?

                  Answer and clinical rationale

                  References

                    Question 2 of 4NPLEX-PCD-010

                    What is the most likely diagnosis?

                    Answer and clinical rationale

                    References

                      Question 3 of 4NPLEX-PCD-011

                      Which rapid bedside assessment is essential because it can mimic stroke?

                      Answer and clinical rationale

                      References

                        Question 4 of 4NPLEX-PCD-012

                        What is the most appropriate action?

                        Next case

                        Answer and clinical rationale

                        References

                          Open case review, differentials, clinical sequence, or NPLEX trap
                          NPLEX trap Do not give oral food, fluids or medication until swallowing safety has been assessed. Case overview The correct priority is: Identify sudden focal neurological loss → determine last-known-well time → check glucose → activate the stroke pathway.

                          Reference framework

                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                          3. American Heart Association/American Stroke Association. Current acute ischemic stroke guidance.
                          4. Canadian Stroke Best Practices. Current recommendations.
                          4

                          Acute Appendicitis

                          4 questions · History, Examination & Clinical Reasoning

                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                          Clinical case
                          Patient profile A 23-year-old man reports abdominal pain that began near the umbilicus approximately 14 hours ago. The pain has migrated to the right lower quadrant. He has anorexia, nausea and one episode of vomiting. Vital signs ● Temperature: 38.0°C ● Blood pressure: 122/76 mmHg ● Heart rate: 98/min ● Respiratory rate: 18/min Physical examination There is localized tenderness and guarding at McBurney point. Coughing increases the pain.
                          Question 1 of 4NPLEX-PCD-013

                          Which symptom sequence is most characteristic of acute appendicitis?

                          Answer and clinical rationale

                          References

                            Question 2 of 4NPLEX-PCD-014

                            Which examination maneuver may support the diagnosis?

                            Answer and clinical rationale

                            References

                              Question 3 of 4NPLEX-PCD-015

                              Which finding would most strongly suggest perforation or generalized peritonitis?

                              Answer and clinical rationale

                              References

                                Question 4 of 4NPLEX-PCD-016

                                What is the most appropriate disposition?

                                Next case

                                Answer and clinical rationale

                                References

                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                  Important differentials ● Gastroenteritis ● Mesenteric adenitis ● Crohn disease ● Ureteric stone ● Testicular torsion ● Ectopic pregnancy or ovarian pathology in patients capable of pregnancy NPLEX trap Vomiting usually follows the onset of pain in appendicitis. Vomiting that clearly precedes pain may suggest another gastrointestinal cause. Case overview The classic diagnostic sequence is: Central abdominal pain → migration to the right lower quadrant → localized peritoneal findings → urgent referral.

                                  Reference framework

                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                  3. World Society of Emergency Surgery. Current emergency general-surgery guidance.
                                  5

                                  Ruptured Ectopic Pregnancy

                                  4 questions · History, Examination & Clinical Reasoning

                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                  Clinical case
                                  Patient profile A 28-year-old woman presents with sudden left-sided pelvic pain, vaginal spotting, dizziness and pain near the right shoulder. Her last menstrual period was approximately seven weeks ago. Medical history ● Previous pelvic inflammatory disease Vital signs ● Temperature: 36.6°C ● Blood pressure: 88/58 mmHg ● Heart rate: 124/min ● Respiratory rate: 24/min Physical examination She appears pale and distressed. The abdomen is tender with guarding.
                                  Question 1 of 4NPLEX-PCD-017

                                  Which point in the history is most clinically important?

                                  Answer and clinical rationale

                                  References

                                    Question 2 of 4NPLEX-PCD-018

                                    What is the most likely diagnosis?

                                    Answer and clinical rationale

                                    References

                                      Question 3 of 4NPLEX-PCD-019

                                      What is the likely mechanism of the shoulder pain?

                                      Answer and clinical rationale

                                      References

                                        Question 4 of 4NPLEX-PCD-020

                                        What is the most appropriate action?

                                        Next case

                                        Answer and clinical rationale

                                        References

                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                          Important differentials ● Ovarian torsion ● Ruptured ovarian cyst ● Pelvic inflammatory disease ● Spontaneous abortion ● Appendicitis NPLEX trap A patient with reproductive potential, abdominal or pelvic pain and vaginal bleeding should be considered pregnant until pregnancy has been reasonably excluded. Case overview The red-flag combination is: Missed period + unilateral pelvic pain + bleeding + shock or shoulder pain.

                                          Reference framework

                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                          3. American College of Obstetricians and Gynecologists. Current practice guidance.
                                          6

                                          Acute Bacterial Meningitis

                                          4 questions · History, Examination & Clinical Reasoning

                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                          Clinical case
                                          Patient profile A 21-year-old university resident presents with severe headache, fever, vomiting and photophobia. His roommate reports that he has become increasingly confused over the last two hours. Vital signs ● Temperature: 39.6°C ● Blood pressure: 96/60 mmHg ● Heart rate: 126/min ● Respiratory rate: 24/min Physical examination The patient is drowsy and has marked neck stiffness. A non-blanching petechial rash is present on the lower extremities.
                                          Question 1 of 4NPLEX-PCD-021

                                          Which finding is the strongest indication of a medical emergency?

                                          Answer and clinical rationale

                                          References

                                            Question 2 of 4NPLEX-PCD-022

                                            What is the most likely diagnosis?

                                            Answer and clinical rationale

                                            References

                                              Question 3 of 4NPLEX-PCD-023

                                              Which examination finding could indicate increased intracranial pressure?

                                              Answer and clinical rationale

                                              References

                                                Question 4 of 4NPLEX-PCD-024

                                                What is the most appropriate immediate response?

                                                Next case

                                                Answer and clinical rationale

                                                References

                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                  Important differentials ● Viral meningitis ● Encephalitis ● Subarachnoid hemorrhage ● Severe migraine ● Brain abscess NPLEX trap Absence of every component of the classic meningitis triad does not exclude meningitis. Altered mental status or petechiae substantially increases urgency. Case overview The priority sequence is: Recognize CNS infection → identify sepsis or meningococcemia → use precautions → transfer immediately.

                                                  Reference framework

                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                  3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                  4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                  7

                                                  Cauda Equina Syndrome

                                                  4 questions · History, Examination & Clinical Reasoning

                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                  Clinical case
                                                  Patient profile A 52-year-old man presents with severe low-back pain following heavy lifting. The pain initially radiated down the left leg. During the last 12 hours, he has developed bilateral leg weakness and numbness around the perineum. Vital signs ● Temperature: 37.0°C ● Blood pressure: 136/84 mmHg ● Heart rate: 94/min ● Respiratory rate: 16/min Physical examination There is reduced bilateral ankle strength and diminished lower-extremity reflexes.
                                                  Question 1 of 4NPLEX-PCD-025

                                                  Which additional history question is most important?

                                                  Answer and clinical rationale

                                                  References

                                                    Question 2 of 4NPLEX-PCD-026

                                                    What is the most likely diagnosis?

                                                    Answer and clinical rationale

                                                    References

                                                      Question 3 of 4NPLEX-PCD-027

                                                      Which additional physical finding would support the diagnosis?

                                                      Answer and clinical rationale

                                                      References

                                                        Question 4 of 4NPLEX-PCD-028

                                                        What is the most appropriate next step?

                                                        Next case

                                                        Answer and clinical rationale

                                                        References

                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                          Important alternative diagnosis Spinal epidural abscess should be strongly considered when back pain and neurological deficits occur with: ● Fever ● Immunosuppression ● Recent bacteremia ● Spinal procedure ● Injection-drug use NPLEX trap Do not perform spinal manipulation when cauda equina syndrome, spinal cord compression, fracture, malignancy or infection is suspected. Case overview The essential red flags are: Saddle anesthesia + bilateral weakness + bladder or bowel dysfunction.

                                                          Reference framework

                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                          3. American College of Radiology. Current Appropriateness Criteria for spine-related presentations.
                                                          8

                                                          Septic Arthritis

                                                          4 questions · History, Examination & Clinical Reasoning

                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                          Clinical case
                                                          Patient profile A 66-year-old woman presents with rapidly progressive pain and swelling of the right knee. She cannot bear weight and reports fever and chills. Medical history ● Type 2 diabetes mellitus ● Rheumatoid arthritis ● Right knee prosthesis Medications ● Methotrexate ● Prednisone ● Metformin Vital signs ● Temperature: 39.0°C ● Blood pressure: 104/66 mmHg ● Heart rate: 116/min ● Respiratory rate: 22/min Physical examination The right knee is hot, swollen and erythematous. Both active and passive range of motion cause severe pain.
                                                          Question 1 of 4NPLEX-PCD-029

                                                          Which feature most strongly supports an intra-articular process?

                                                          Answer and clinical rationale

                                                          References

                                                            Question 2 of 4NPLEX-PCD-030

                                                            What is the most important diagnosis to exclude?

                                                            Answer and clinical rationale

                                                            References

                                                              Question 3 of 4NPLEX-PCD-031

                                                              Which diagnostic procedure is most important?

                                                              Answer and clinical rationale

                                                              References

                                                                Question 4 of 4NPLEX-PCD-032

                                                                What is the most appropriate management priority?

                                                                Next case

                                                                Answer and clinical rationale

                                                                References

                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                  Important differentials ● Gout ● Pseudogout ● Hemarthrosis ● Reactive arthritis ● Acute inflammatory arthritis NPLEX trap Do not inject corticosteroid into an acutely inflamed joint until infection has been adequately excluded. Case overview The high-risk pattern is: Acute hot monoarthritis + fever + severe passive-motion pain + immunosuppression or prosthetic joint.

                                                                  Reference framework

                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                  3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                  4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                  9

                                                                  Rotator-Cuff Impingement

                                                                  4 questions · History, Examination & Clinical Reasoning

                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                  Clinical case
                                                                  Patient profile A 42-year-old painter reports gradually worsening right-shoulder pain over three months. The pain is aggravated by overhead work and when lying on the affected side. Vital signs Normal. Physical examination ● Active abduction is painful between approximately 60° and 120°. ● Passive range of motion is nearly normal. ● Hawkins–Kennedy test is positive. ● There is no deformity or neurological deficit.
                                                                  Question 1 of 4NPLEX-PCD-033

                                                                  What is the most likely diagnosis?

                                                                  Answer and clinical rationale

                                                                  References

                                                                    Question 2 of 4NPLEX-PCD-034

                                                                    Which finding would make adhesive capsulitis more likely?

                                                                    Answer and clinical rationale

                                                                    References

                                                                      Question 3 of 4NPLEX-PCD-035

                                                                      Which test is most useful when evaluating a possible full-thickness rotator-cuff tear?

                                                                      Answer and clinical rationale

                                                                      References

                                                                        Question 4 of 4NPLEX-PCD-036

                                                                        Which new finding would warrant more urgent imaging or specialist assessment?

                                                                        Next case

                                                                        Answer and clinical rationale

                                                                        References

                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                          Important differentials ● Rotator-cuff tear ● Adhesive capsulitis ● Acromioclavicular joint disease ● Biceps tendinopathy ● Cervical radiculopathy ● Glenohumeral arthritis NPLEX trap Preserved passive motion with painful active overhead movement supports rotator-cuff or subacromial pathology. Loss of passive motion suggests adhesive capsulitis or advanced joint disease. Case overview This case tests non-emergency clinical reasoning: Identify the movement pattern → distinguish active from passive restriction → select the appropriate orthopedic test.

                                                                          Reference framework

                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                          3. American Academy of Orthopaedic Surgeons. Current clinical guidance and appropriate-use criteria.
                                                                          10

                                                                          Acute Mania With Psychotic Features

                                                                          4 questions · History, Examination & Clinical Reasoning

                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                          Clinical case
                                                                          Patient profile A 32-year-old woman is brought by her sister because she has slept fewer than two hours per night for six days. She speaks rapidly, says she has discovered a method to become a billionaire and has spent $18,000 during the past week. She reports hearing a voice telling her that she has been selected for a “special global mission.” She becomes irritable when her family questions her plans. Medical history ● Previous depressive episode ● No known neurological disease Medications ● Sertraline, started six weeks ago ● The patient recently doubled the dose without medical advice Vital signs ● Temperature: 37.1°C ● Blood pressure: 148/90 mmHg ● Heart rate: 108/min ● Respiratory rate: 18/min Mental-status examination ● Bright, flamboyant clothing ● Psychomotor agitation ● Pressured speech ● Expansive and irritable mood ● Flight of ideas ● Grandiose delusions ● Auditory hallucinations ● Poor insight and impaired judgment
                                                                          Question 1 of 4NPLEX-PCD-037

                                                                          Which issue must be assessed immediately?

                                                                          Answer and clinical rationale

                                                                          References

                                                                            Question 2 of 4NPLEX-PCD-038

                                                                            What is the most likely diagnosis?

                                                                            Answer and clinical rationale

                                                                            References

                                                                              Question 3 of 4NPLEX-PCD-039

                                                                              Which alternative cause must be actively considered?

                                                                              Answer and clinical rationale

                                                                              References

                                                                                Question 4 of 4NPLEX-PCD-040

                                                                                What is the most appropriate disposition?

                                                                                Next case

                                                                                Answer and clinical rationale

                                                                                References

                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                  NPLEX trap A patient with mania may deny feeling unwell. Lack of subjective distress does not indicate clinical stability. Case overview The clinical priority is: Identify mania → assess psychosis and safety → consider medication or substance causes → arrange urgent psychiatric evaluation.

                                                                                  Reference framework

                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                  3. American Psychiatric Association. DSM-5-TR and current practice guidance.
                                                                                  4. Goldfrank’s Toxicologic Emergencies. Current edition.
                                                                                  11

                                                                                  Acute Upper Gastrointestinal Bleeding

                                                                                  4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                  Clinical case
                                                                                  Patient profile A 61-year-old man presents with dizziness, weakness and two episodes of vomiting dark, coffee-ground material. He reports passing a black, sticky stool earlier that morning. Medical history ● Osteoarthritis ● Hypertension ● Previous dyspepsia Medications ● Ibuprofen, 600 mg three times daily ● Amlodipine Vital signs ● Temperature: 36.7°C ● Blood pressure: 92/58 mmHg while supine ● Heart rate: 118/min ● Respiratory rate: 22/min ● Oxygen saturation: 96% on room air Physical examination The patient appears pale and diaphoretic. His abdomen is mildly tender in the epigastric region without rigidity. Rectal examination reveals black, tarry stool.
                                                                                  Question 1 of 4NPLEX-PCD-041

                                                                                  Which medication is the most important risk factor for this presentation?

                                                                                  Answer and clinical rationale

                                                                                  References

                                                                                    Question 2 of 4NPLEX-PCD-042

                                                                                    What is the most likely diagnosis?

                                                                                    Answer and clinical rationale

                                                                                    References

                                                                                      Question 3 of 4NPLEX-PCD-043

                                                                                      Which additional historical finding would increase concern for esophageal variceal bleeding?

                                                                                      Answer and clinical rationale

                                                                                      References

                                                                                        Question 4 of 4NPLEX-PCD-044

                                                                                        What is the most appropriate immediate action?

                                                                                        Next case

                                                                                        Answer and clinical rationale

                                                                                        References

                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                          Important differentials ● Peptic-ulcer bleeding ● Esophageal or gastric varices ● Erosive gastritis ● Mallory–Weiss tear ● Upper gastrointestinal malignancy NPLEX trap Do not be falsely reassured by the absence of severe abdominal pain. Significant gastrointestinal hemorrhage may occur with minimal abdominal tenderness. Case overview Hematemesis or coffee-ground emesis + melena + hemodynamic instability = emergency gastrointestinal hemorrhage.

                                                                                          Reference framework

                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                          3. American College of Gastroenterology. Current upper gastrointestinal and ulcer-bleeding guidance.
                                                                                          12

                                                                                          Acute Angle-Closure Glaucoma

                                                                                          4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                          Clinical case
                                                                                          Patient profile A 67-year-old woman presents with sudden severe pain in the right eye, blurred vision, headache, nausea and vomiting. The symptoms began while she was watching a movie in a dark theatre. Medical history ● Hyperopia ● Hypertension Medications ● Hydrochlorothiazide ● Recently started an anticholinergic medication for urinary urgency Vital signs ● Temperature: 36.9°C ● Blood pressure: 168/94 mmHg ● Heart rate: 102/min Physical examination The right eye is intensely red. The cornea appears cloudy. The right pupil is moderately dilated, irregular and poorly reactive to light. Visual acuity is reduced.
                                                                                          Question 1 of 4NPLEX-PCD-045

                                                                                          What is the most likely diagnosis?

                                                                                          Answer and clinical rationale

                                                                                          References

                                                                                            Question 2 of 4NPLEX-PCD-046

                                                                                            Which symptom most strongly distinguishes this condition from uncomplicated conjunctivitis?

                                                                                            Answer and clinical rationale

                                                                                            References

                                                                                              Question 3 of 4NPLEX-PCD-047

                                                                                              Which medication history is clinically relevant?

                                                                                              Answer and clinical rationale

                                                                                              References

                                                                                                Question 4 of 4NPLEX-PCD-048

                                                                                                What is the most appropriate next step?

                                                                                                Next case

                                                                                                Answer and clinical rationale

                                                                                                References

                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                  Important differentials ● Anterior uveitis ● Keratitis ● Corneal abrasion ● Scleritis ● Conjunctivitis NPLEX trap A red eye accompanied by severe pain, impaired vision, vomiting or an abnormal pupil should not be treated as routine conjunctivitis. Case overview Painful red eye + reduced vision + cloudy cornea + fixed or poorly reactive pupil = emergency referral.

                                                                                                  Reference framework

                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                  3. American Academy of Ophthalmology. Current Preferred Practice Pattern guidance.
                                                                                                  13

                                                                                                  Thyroid Storm

                                                                                                  4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                  Clinical case
                                                                                                  Patient profile A 43-year-old woman with Graves disease presents with fever, agitation, vomiting, diarrhea and severe palpitations. She stopped taking methimazole three weeks ago because she felt better. She developed cough and dysuria several days ago. Vital signs ● Temperature: 40.1°C ● Blood pressure: 154/72 mmHg ● Heart rate: 164/min, irregularly irregular ● Respiratory rate: 30/min ● Oxygen saturation: 92% on room air Physical examination The patient is restless and confused. Her skin is hot and moist. A diffuse goitre and fine hand tremor are present. Bibasilar crackles and mild lower-extremity edema are noted.
                                                                                                  Question 1 of 4NPLEX-PCD-049

                                                                                                  What is the most likely diagnosis?

                                                                                                  Answer and clinical rationale

                                                                                                  References

                                                                                                    Question 2 of 4NPLEX-PCD-050

                                                                                                    Which factor most likely precipitated this episode?

                                                                                                    Answer and clinical rationale

                                                                                                    References

                                                                                                      Question 3 of 4NPLEX-PCD-051

                                                                                                      Which finding most strongly distinguishes thyroid storm from uncomplicated hyperthyroidism?

                                                                                                      Answer and clinical rationale

                                                                                                      References

                                                                                                        Question 4 of 4NPLEX-PCD-052

                                                                                                        What is the most appropriate action?

                                                                                                        Next case

                                                                                                        Answer and clinical rationale

                                                                                                        References

                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                          Important differentials ● Sepsis ● Serotonin syndrome ● Neuroleptic malignant syndrome ● Stimulant intoxication ● Pheochromocytoma crisis ● Severe heat illness NPLEX trap A thyroid hormone level alone does not determine whether thyroid storm is present. The diagnosis depends heavily on systemic clinical findings. Case overview Known hyperthyroidism + high fever + extreme tachycardia + delirium or organ failure = thyroid storm until proven otherwise.

                                                                                                          Reference framework

                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                          3. American Thyroid Association. Current hyperthyroidism and thyrotoxicosis guidance.
                                                                                                          14

                                                                                                          Anaphylaxis

                                                                                                          4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                          Clinical case
                                                                                                          Patient profile A 29-year-old man develops diffuse itching, facial swelling, throat tightness and difficulty breathing several minutes after eating a dessert containing peanuts. Medical history ● Peanut allergy ● Mild asthma Vital signs ● Blood pressure: 78/46 mmHg ● Heart rate: 132/min ● Respiratory rate: 32/min ● Oxygen saturation: 86% on room air Physical examination The patient has diffuse urticaria, swollen lips, inspiratory stridor and bilateral wheezing. He appears frightened and is becoming drowsy.
                                                                                                          Question 1 of 4NPLEX-PCD-053

                                                                                                          What is the most likely diagnosis?

                                                                                                          Answer and clinical rationale

                                                                                                          References

                                                                                                            Question 2 of 4NPLEX-PCD-054

                                                                                                            Which finding represents the greatest immediate threat?

                                                                                                            Answer and clinical rationale

                                                                                                            References

                                                                                                              Question 3 of 4NPLEX-PCD-055

                                                                                                              What is the first-line treatment?

                                                                                                              Answer and clinical rationale

                                                                                                              References

                                                                                                                Question 4 of 4NPLEX-PCD-056

                                                                                                                Which action is most appropriate after administering epinephrine?

                                                                                                                Next case

                                                                                                                Answer and clinical rationale

                                                                                                                References

                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                  Important differentials ● Acute severe asthma ● Angioedema ● Vasovagal reaction ● Panic attack ● Foreign-body airway obstruction NPLEX trap Do not delay epinephrine while waiting for every diagnostic criterion to appear. A rash may also be absent in severe anaphylaxis. Case overview Rapid multisystem allergic reaction involving airway, breathing or circulation requires immediate intramuscular epinephrine.

                                                                                                                  Reference framework

                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                  3. AAAAI/ACAAI Joint Task Force. Current anaphylaxis practice parameter.
                                                                                                                  15

                                                                                                                  Moderate-to-Severe Croup

                                                                                                                  4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                  Clinical case
                                                                                                                  Patient profile A 2-year-old child is brought to the clinic with a barking cough, hoarse voice and noisy breathing. The illness began with rhinorrhea and low-grade fever one day earlier. Vital signs ● Temperature: 38.0°C ● Heart rate: 148/min ● Respiratory rate: 38/min ● Oxygen saturation: 93% on room air Physical examination The child has inspiratory stridor while resting, suprasternal retractions and decreased air entry. The child is alert but agitated. There is no drooling.
                                                                                                                  Question 1 of 4NPLEX-PCD-057

                                                                                                                  What is the most likely diagnosis?

                                                                                                                  Answer and clinical rationale

                                                                                                                  References

                                                                                                                    Question 2 of 4NPLEX-PCD-058

                                                                                                                    Which finding indicates clinically important upper-airway obstruction?

                                                                                                                    Answer and clinical rationale

                                                                                                                    References

                                                                                                                      Question 3 of 4NPLEX-PCD-059

                                                                                                                      Which finding would make epiglottitis more likely?

                                                                                                                      Answer and clinical rationale

                                                                                                                      References

                                                                                                                        Question 4 of 4NPLEX-PCD-060

                                                                                                                        What is the most appropriate disposition?

                                                                                                                        Next case

                                                                                                                        Answer and clinical rationale

                                                                                                                        References

                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                          Important differentials ● Epiglottitis ● Bacterial tracheitis ● Foreign-body aspiration ● Retropharyngeal abscess ● Anaphylaxis NPLEX trap Do not force a distressed child with possible epiglottitis to lie supine or undergo an unnecessary throat examination. Case overview Barking cough and hoarseness suggest croup; drooling, tripod positioning and toxic appearance suggest a more dangerous alternative.

                                                                                                                          Reference framework

                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                          3. Canadian Paediatric Society. Current acute croup guidance.
                                                                                                                          16

                                                                                                                          Testicular Torsion

                                                                                                                          4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                          Clinical case
                                                                                                                          Patient profile A 16-year-old boy develops sudden severe left testicular pain while sleeping. He has nausea and has vomited twice. He denies dysuria, urethral discharge and recent trauma. Vital signs ● Temperature: 37.1°C ● Blood pressure: 126/76 mmHg ● Heart rate: 108/min Physical examination The left testis is swollen, tender and positioned higher than the right. It lies in a horizontal orientation. The left cremasteric reflex is absent.
                                                                                                                          Question 1 of 4NPLEX-PCD-061

                                                                                                                          What is the most likely diagnosis?

                                                                                                                          Answer and clinical rationale

                                                                                                                          References

                                                                                                                            Question 2 of 4NPLEX-PCD-062

                                                                                                                            Which presentation would be more consistent with epididymitis?

                                                                                                                            Answer and clinical rationale

                                                                                                                            References

                                                                                                                              Question 3 of 4NPLEX-PCD-063

                                                                                                                              Which physical finding most strongly supports torsion?

                                                                                                                              Answer and clinical rationale

                                                                                                                              References

                                                                                                                                Question 4 of 4NPLEX-PCD-064

                                                                                                                                What is the most appropriate next step?

                                                                                                                                Next case

                                                                                                                                Answer and clinical rationale

                                                                                                                                References

                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                  Important differentials ● Epididymitis ● Torsion of the appendix testis ● Incarcerated inguinal hernia ● Testicular trauma ● Orchitis NPLEX trap Pain relief with elevation of the testicle is not sufficiently reliable to exclude torsion. Case overview Sudden testicular pain + nausea + high-riding testis + absent cremasteric reflex = immediate surgical referral.

                                                                                                                                  Reference framework

                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                  3. American Urological Association. Current acute-scrotum and testicular-torsion educational guidance.
                                                                                                                                  17

                                                                                                                                  Giant Cell Arteritis

                                                                                                                                  4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                  Clinical case
                                                                                                                                  Patient profile A 74-year-old woman presents with a new right-sided temporal headache, scalp tenderness and fatigue. She reports pain in her jaw while chewing and two brief episodes of blurred vision in the right eye. She has also experienced morning stiffness in both shoulders for several months. Vital signs ● Temperature: 37.5°C ● Blood pressure: 146/82 mmHg ● Heart rate: 88/min Physical examination The right temporal artery is tender, thickened and has reduced pulsation. Shoulder movement is painful but neurological examination is otherwise normal.
                                                                                                                                  Question 1 of 4NPLEX-PCD-065

                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                  Answer and clinical rationale

                                                                                                                                  References

                                                                                                                                    Question 2 of 4NPLEX-PCD-066

                                                                                                                                    Which symptom is particularly predictive of cranial arterial ischemia?

                                                                                                                                    Answer and clinical rationale

                                                                                                                                    References

                                                                                                                                      Question 3 of 4NPLEX-PCD-067

                                                                                                                                      What is the most serious complication?

                                                                                                                                      Answer and clinical rationale

                                                                                                                                      References

                                                                                                                                        Question 4 of 4NPLEX-PCD-068

                                                                                                                                        What is the most appropriate next step?

                                                                                                                                        Next case

                                                                                                                                        Answer and clinical rationale

                                                                                                                                        References

                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                          Important association The shoulder and hip girdle stiffness suggests coexisting polymyalgia rheumatica. Important differentials ● Migraine ● Tension headache ● Temporomandibular joint disorder ● Intracranial mass ● Carotid or vertebral vascular disease NPLEX trap A normal neurological examination does not exclude giant cell arteritis or imminent visual loss. Case overview New headache after age 50 + jaw claudication + temporal tenderness + visual symptoms = immediate action.

                                                                                                                                          Reference framework

                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                          3. American College of Rheumatology/Vasculitis Foundation. Current giant-cell arteritis guidance.
                                                                                                                                          18

                                                                                                                                          Necrotizing Soft-Tissue Infection

                                                                                                                                          4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                          Clinical case
                                                                                                                                          Patient profile A 59-year-old man with poorly controlled diabetes presents with severe pain in his left lower leg. He scratched the leg on a metal shelf two days ago. The area has rapidly become swollen and discoloured. He reports fever, vomiting and profound weakness. Vital signs ● Temperature: 39.4°C ● Blood pressure: 86/54 mmHg ● Heart rate: 132/min ● Respiratory rate: 28/min ● Oxygen saturation: 94% Physical examination The lower leg is edematous with rapidly spreading erythema, violaceous discoloration and several hemorrhagic bullae. The pain extends far beyond the visible skin changes. Crepitus is present.
                                                                                                                                          Question 1 of 4NPLEX-PCD-069

                                                                                                                                          What is the most likely diagnosis?

                                                                                                                                          Answer and clinical rationale

                                                                                                                                          References

                                                                                                                                            Question 2 of 4NPLEX-PCD-070

                                                                                                                                            Which early feature is particularly concerning?

                                                                                                                                            Answer and clinical rationale

                                                                                                                                            References

                                                                                                                                              Question 3 of 4NPLEX-PCD-071

                                                                                                                                              Which finding suggests advanced tissue necrosis?

                                                                                                                                              Answer and clinical rationale

                                                                                                                                              References

                                                                                                                                                Question 4 of 4NPLEX-PCD-072

                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                Next case

                                                                                                                                                Answer and clinical rationale

                                                                                                                                                References

                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                  Important differentials ● Severe cellulitis ● Compartment syndrome ● Deep-vein thrombosis ● Pyomyositis ● Gas gangrene ● Calciphylaxis NPLEX trap Do not wait for crepitus, bullae or skin necrosis before considering the diagnosis. These may be late findings. Case overview Rapid progression + disproportionate pain + systemic toxicity = necrotizing infection until excluded.

                                                                                                                                                  Reference framework

                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                  3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                                                                                                  4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                                                                                                  19

                                                                                                                                                  Cervical Radiculopathy

                                                                                                                                                  4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                  Clinical case
                                                                                                                                                  Patient profile A 47-year-old office worker presents with neck pain radiating into the right lateral forearm, thumb and index finger. The symptoms worsen when he rotates and extends his neck toward the affected side. He denies trauma, fever, gait disturbance and bladder dysfunction. Physical examination ● Mild weakness of right elbow flexion and wrist extension ● Reduced right biceps reflex ● Decreased sensation over the thumb ● No lower-extremity hyperreflexia ● Normal gait
                                                                                                                                                  Question 1 of 4NPLEX-PCD-073

                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                  References

                                                                                                                                                    Question 2 of 4NPLEX-PCD-074

                                                                                                                                                    Which examination test is most appropriate?

                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                    References

                                                                                                                                                      Question 3 of 4NPLEX-PCD-075

                                                                                                                                                      Which finding would indicate possible cervical myelopathy rather than isolated radiculopathy?

                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                      References

                                                                                                                                                        Question 4 of 4NPLEX-PCD-076

                                                                                                                                                        What is the most appropriate initial approach in this stable patient?

                                                                                                                                                        Next case

                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                        References

                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                          Important differentials ● Median neuropathy ● Brachial plexopathy ● Shoulder pathology ● Thoracic outlet syndrome ● Cervical myelopathy ● Pancoast tumour NPLEX trap Do not confuse a single nerve-root lesion with a peripheral mononeuropathy. Compare the dermatomal pattern, reflexes, myotomes and provocative tests. Case overview Dermatomal pain + myotomal weakness + reflex change = radiculopathy; long-tract signs suggest myelopathy.

                                                                                                                                                          Reference framework

                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                          3. American College of Radiology. Current Appropriateness Criteria for spine-related presentations.
                                                                                                                                                          20

                                                                                                                                                          Anterior Cruciate Ligament Tear

                                                                                                                                                          4 questions · Focused Diagnosis, Red Flags & Referral

                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                          Clinical case
                                                                                                                                                          Patient profile A 24-year-old soccer player reports twisting the right knee while abruptly changing direction. She heard a “pop,” fell to the ground and developed substantial knee swelling within two hours. She now reports instability and a sensation that the knee will give way. Physical examination ● Moderate knee effusion ● Reduced flexion because of swelling ● Positive Lachman test ● Increased anterior tibial translation with a soft endpoint ● No obvious deformity ● Distal pulses and sensation are intact
                                                                                                                                                          Question 1 of 4NPLEX-PCD-077

                                                                                                                                                          What is the most likely diagnosis?

                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                          References

                                                                                                                                                            Question 2 of 4NPLEX-PCD-078

                                                                                                                                                            Which examination test is most useful for assessing the ACL?

                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                            References

                                                                                                                                                              Question 3 of 4NPLEX-PCD-079

                                                                                                                                                              Which test is most appropriate for a possible associated meniscal tear?

                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                              References

                                                                                                                                                                Question 4 of 4NPLEX-PCD-080

                                                                                                                                                                Which new finding would require urgent rather than routine assessment?

                                                                                                                                                                Next case

                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                References

                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                  Important differentials ● Meniscal tear ● Medial collateral ligament injury ● Patellar dislocation ● Tibial plateau fracture ● Osteochondral injury ● Multiligament knee injury NPLEX trap Rapid swelling after a twisting injury suggests hemarthrosis and significant intra-articular injury. Delayed swelling is more typical of a smaller effusion or some meniscal injuries. Case overview Pivoting mechanism + pop + rapid effusion + positive Lachman test = ACL injury.

                                                                                                                                                                  Reference framework

                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                  3. American Academy of Orthopaedic Surgeons. Current clinical guidance and appropriate-use criteria.
                                                                                                                                                                  21

                                                                                                                                                                  Acute Aortic Dissection

                                                                                                                                                                  6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                  Clinical case
                                                                                                                                                                  Patient profile A 63-year-old man presents with sudden, severe chest pain that began while he was lifting a heavy object. He describes the pain as “tearing” and says it radiates between his shoulder blades. Medical history ● Poorly controlled hypertension ● Tobacco use ● Hyperlipidemia Vital signs ● Temperature: 36.7°C ● Right-arm blood pressure: 198/106 mmHg ● Left-arm blood pressure: 168/92 mmHg ● Heart rate: 112/min ● Respiratory rate: 24/min ● Oxygen saturation: 95% on room air Physical examination The patient is pale and diaphoretic. The right radial pulse is stronger than the left. A new early diastolic murmur is heard along the left sternal border.
                                                                                                                                                                  Question 1 of 6NPLEX-PCD-081

                                                                                                                                                                  Which historical feature most strongly supports acute aortic dissection?

                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                  References

                                                                                                                                                                    Question 2 of 6NPLEX-PCD-082

                                                                                                                                                                    What is the most likely diagnosis?

                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                    References

                                                                                                                                                                      Question 3 of 6NPLEX-PCD-083

                                                                                                                                                                      Which examination finding is most concerning for extension into a major arterial branch?

                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                      References

                                                                                                                                                                        Question 4 of 6NPLEX-PCD-084

                                                                                                                                                                        Which new finding would indicate neurological involvement?

                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                        References

                                                                                                                                                                          Question 5 of 6NPLEX-PCD-085

                                                                                                                                                                          What is the most appropriate next step?

                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                          References

                                                                                                                                                                            Question 6 of 6NPLEX-PCD-086

                                                                                                                                                                            Which action should be avoided before dissection is excluded?

                                                                                                                                                                            Next case

                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                            References

                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                              Important differentials ● Acute coronary syndrome ● Pulmonary embolism ● Pericarditis ● Tension pneumothorax ● Esophageal rupture NPLEX trap Myocardial ischemia can occur during aortic dissection. Do not assume that ischemic electrocardiographic findings automatically exclude dissection.

                                                                                                                                                                              Reference framework

                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                              3. American College of Cardiology/American Heart Association. Current aortic, pericardial, and vascular-disease guidance.
                                                                                                                                                                              22

                                                                                                                                                                              Diabetic Ketoacidosis

                                                                                                                                                                              6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                              Clinical case
                                                                                                                                                                              Patient profile A 24-year-old woman with type 1 diabetes presents with vomiting, abdominal pain, weakness, and increasing thirst. She has been unwell with influenza-like symptoms and has taken very little insulin during the past two days. Vital signs ● Temperature: 38.1°C ● Blood pressure: 94/60 mmHg ● Heart rate: 124/min ● Respiratory rate: 30/min and deep ● Oxygen saturation: 97% on room air Physical examination She is drowsy but arousable. Her mucous membranes are dry. Her breath has a fruity odor. Diffuse mild abdominal tenderness is present without rigidity.
                                                                                                                                                                              Question 1 of 6NPLEX-PCD-087

                                                                                                                                                                              Which aspect of the history most likely precipitated the current condition?

                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                              References

                                                                                                                                                                                Question 2 of 6NPLEX-PCD-088

                                                                                                                                                                                What is the most likely diagnosis?

                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                References

                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-089

                                                                                                                                                                                  What is the term for the patient’s respiratory pattern?

                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                  References

                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-090

                                                                                                                                                                                    Which bedside test is most important initially?

                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                    References

                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-091

                                                                                                                                                                                      Which complication requires particularly close monitoring during treatment?

                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                      References

                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-092

                                                                                                                                                                                        What is the most appropriate disposition?

                                                                                                                                                                                        Next case

                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                        References

                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                          Important differentials ● Hyperosmolar hyperglycemic state ● Sepsis ● Starvation ketosis ● Alcoholic ketoacidosis ● Acute abdomen ● Toxic ingestion NPLEX trap Abdominal pain may occur in diabetic ketoacidosis. Reassess the abdomen after metabolic stabilization before assuming a surgical diagnosis.

                                                                                                                                                                                          Reference framework

                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                          3. American Diabetes Association. Standards of Care in Diabetes—2026.
                                                                                                                                                                                          23

                                                                                                                                                                                          Subarachnoid Hemorrhage

                                                                                                                                                                                          6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                          Clinical case
                                                                                                                                                                                          Patient profile A 46-year-old woman develops a sudden severe headache while exercising. She describes it as “the worst headache of my life.” She vomited and briefly lost consciousness. Medical history ● Hypertension ● Tobacco use ● Sister with a cerebral aneurysm Vital signs ● Temperature: 37.0°C ● Blood pressure: 188/104 mmHg ● Heart rate: 98/min ● Respiratory rate: 20/min Physical examination The patient is photophobic and has neck stiffness. She is alert but appears distressed. No focal neurological deficit is initially detected.
                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-093

                                                                                                                                                                                          Which history feature is most concerning?

                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                          References

                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-094

                                                                                                                                                                                            What is the most likely diagnosis?

                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                            References

                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-095

                                                                                                                                                                                              Which physical finding may be present despite the absence of meningitis?

                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                              References

                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-096

                                                                                                                                                                                                Which alternative diagnosis must also be urgently considered in a thunderclap headache?

                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                References

                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-097

                                                                                                                                                                                                  What is the most appropriate next step?

                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                  References

                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-098

                                                                                                                                                                                                    Which change would indicate clinical deterioration?

                                                                                                                                                                                                    Next case

                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                    References

                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                      Important differentials ● Migraine ● Meningitis ● Cervical arterial dissection ● Cerebral venous thrombosis ● Reversible cerebral vasoconstriction syndrome ● Pituitary apoplexy NPLEX trap Do not exclude subarachnoid hemorrhage because the neurological examination is initially normal.

                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                      3. American Heart Association/American Stroke Association. Current aneurysmal subarachnoid hemorrhage guideline.
                                                                                                                                                                                                      24

                                                                                                                                                                                                      Small-Bowel Obstruction

                                                                                                                                                                                                      6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                      Patient profile A 58-year-old woman presents with cramping abdominal pain, repeated bilious vomiting, abdominal distension, and inability to pass stool or flatus for 24 hours. Medical history ● Previous open abdominal hysterectomy ● Hypertension Vital signs ● Temperature: 37.8°C ● Blood pressure: 104/66 mmHg ● Heart rate: 112/min ● Respiratory rate: 22/min Physical examination The abdomen is distended and tympanitic. High-pitched bowel sounds are heard. There is diffuse tenderness without initial rigidity.
                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-099

                                                                                                                                                                                                      Which historical factor most strongly increases the risk of this condition?

                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                      References

                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-100

                                                                                                                                                                                                        What is the most likely diagnosis?

                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                        References

                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-101

                                                                                                                                                                                                          Which finding would suggest bowel ischemia or strangulation?

                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                          References

                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-102

                                                                                                                                                                                                            Which examination finding is expected early in mechanical obstruction?

                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                            References

                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-103

                                                                                                                                                                                                              What is the most appropriate next step?

                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                              References

                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-104

                                                                                                                                                                                                                Which intervention should be avoided?

                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                References

                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                  Important differentials ● Ileus ● Large-bowel obstruction ● Gastroenteritis ● Mesenteric ischemia ● Perforated viscus ● Severe constipation NPLEX trap Temporary passage of stool early in the illness does not fully exclude bowel obstruction because distal contents may still be expelled.

                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                  3. World Society of Emergency Surgery. Current emergency general-surgery guidance.
                                                                                                                                                                                                                  25

                                                                                                                                                                                                                  Ovarian Torsion

                                                                                                                                                                                                                  6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                  Patient profile A 31-year-old woman presents with sudden severe right-sided pelvic pain accompanied by nausea and vomiting. She has a known 7-cm ovarian cyst. Her last menstrual period was two weeks ago. She denies vaginal bleeding. Vital signs ● Temperature: 37.4°C ● Blood pressure: 118/74 mmHg ● Heart rate: 108/min ● Respiratory rate: 20/min Physical examination There is marked right-lower-quadrant and pelvic tenderness. Guarding is mild. No abdominal rigidity is present.
                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-105

                                                                                                                                                                                                                  Which historical factor most increases the likelihood of ovarian torsion?

                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                  References

                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-106

                                                                                                                                                                                                                    What is the most likely diagnosis?

                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                    References

                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-107

                                                                                                                                                                                                                      Which diagnosis must be excluded in every reproductive-age patient with acute pelvic pain?

                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                      References

                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-108

                                                                                                                                                                                                                        Which characteristic best differentiates torsion from uncomplicated pelvic inflammatory disease?

                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                        References

                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-109

                                                                                                                                                                                                                          What is the most appropriate next step?

                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                          References

                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-110

                                                                                                                                                                                                                            Which statement about imaging is most accurate?

                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                            References

                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                              Important differentials ● Ectopic pregnancy ● Ruptured ovarian cyst ● Appendicitis ● Pelvic inflammatory disease ● Ureteric stone NPLEX trap A normal Doppler result does not reliably override a highly suspicious clinical presentation.

                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                              3. American College of Obstetricians and Gynecologists. Current practice guidance.
                                                                                                                                                                                                                              26

                                                                                                                                                                                                                              Pediatric Intussusception

                                                                                                                                                                                                                              6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                              Patient profile A 10-month-old infant is brought to the clinic for repeated episodes of intense crying. During each episode, the child pulls both knees toward the abdomen and becomes pale. Between episodes, the child initially appears tired but comfortable. The child has vomited twice. Vital signs ● Temperature: 37.6°C ● Heart rate: 142/min ● Respiratory rate: 30/min ● Oxygen saturation: 98% Physical examination The abdomen is mildly distended. A sausage-shaped mass is palpated in the right upper abdomen. The diaper contains stool mixed with blood and mucus.
                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-111

                                                                                                                                                                                                                              What is the most likely diagnosis?

                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-112

                                                                                                                                                                                                                                What causes the intermittent nature of the pain?

                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-113

                                                                                                                                                                                                                                  Which stool description is classically associated with this condition?

                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-114

                                                                                                                                                                                                                                    Which finding would suggest bowel perforation or advanced ischemia?

                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-115

                                                                                                                                                                                                                                      What is the most appropriate next step?

                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-116

                                                                                                                                                                                                                                        Which diagnosis is more likely when an infant has progressive non-bilious projectile vomiting without episodic pain?

                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                          Important differentials ● Gastroenteritis ● Volvulus ● Incarcerated hernia ● Pyloric stenosis ● Meckel diverticulum ● Child abuse NPLEX trap The classic triad is not present in every case. Episodic pain and lethargy may precede visible blood in the stool.

                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                          3. American Academy of Pediatrics. Current pediatric emergency guidance.
                                                                                                                                                                                                                                          27

                                                                                                                                                                                                                                          Acute Pyelonephritis With Sepsis

                                                                                                                                                                                                                                          6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                          Patient profile A 48-year-old woman presents with fever, shaking chills, nausea, dysuria, and left-sided flank pain. She became confused shortly before arrival. Medical history ● Type 2 diabetes mellitus ● Recurrent urinary tract infections Vital signs ● Temperature: 39.5°C ● Blood pressure: 84/52 mmHg ● Heart rate: 128/min ● Respiratory rate: 26/min ● Oxygen saturation: 94% Physical examination The patient is lethargic. Left costovertebral-angle tenderness is marked. The lower abdomen is mildly tender.
                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-117

                                                                                                                                                                                                                                          What is the most likely primary diagnosis?

                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-118

                                                                                                                                                                                                                                            Which finding indicates progression to sepsis or septic shock?

                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-119

                                                                                                                                                                                                                                              Which examination maneuver is most relevant?

                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-120

                                                                                                                                                                                                                                                Which alternative diagnosis should be considered when flank pain is severe and colicky with hematuria?

                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-121

                                                                                                                                                                                                                                                  Why is an obstructed infected urinary system especially dangerous?

                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-122

                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                      Important differentials ● Ureteric stone ● Renal abscess ● Acute appendicitis ● Pelvic inflammatory disease ● Diverticulitis ● Musculoskeletal flank pain NPLEX trap A urinary infection in a patient with hypotension, confusion, diabetes, pregnancy, or possible obstruction is not uncomplicated cystitis.

                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                      3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                                                                                                                                                                                                      4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                                                                                                                                                                                                      28

                                                                                                                                                                                                                                                      Cutaneous Melanoma

                                                                                                                                                                                                                                                      6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                      Patient profile A 52-year-old man presents for assessment of a pigmented lesion on his upper back. His spouse reports that the lesion has enlarged and changed colour during the past six months. Medical history ● Multiple blistering sunburns during childhood ● Frequent outdoor work ● Father previously treated for melanoma Physical examination The lesion is 11 mm in diameter, asymmetrical, and has an irregular border. It contains dark brown, black, red, and pale areas. A small area recently bled without trauma.
                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-123

                                                                                                                                                                                                                                                      Which feature is represented by the “E” in the ABCDE melanoma assessment?

                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-124

                                                                                                                                                                                                                                                        What is the most likely diagnosis?

                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-125

                                                                                                                                                                                                                                                          Which historical feature increases melanoma risk?

                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-126

                                                                                                                                                                                                                                                            Which method is generally preferred for initial diagnostic sampling when feasible?

                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-127

                                                                                                                                                                                                                                                              Which physical characteristic is most concerning?

                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-128

                                                                                                                                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                  Important differentials ● Dysplastic nevus ● Seborrheic keratosis ● Pigmented basal-cell carcinoma ● Lentigo ● Dermatofibroma ● Subungual hematoma NPLEX trap A lesion does not need to meet every ABCDE criterion to warrant biopsy. Evolution or an “ugly duckling” appearance may be sufficient.

                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                  3. National Comprehensive Cancer Network. Current clinical practice guidelines in oncology.
                                                                                                                                                                                                                                                                  29

                                                                                                                                                                                                                                                                  Myasthenic Crisis

                                                                                                                                                                                                                                                                  6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                  Patient profile A 37-year-old woman with myasthenia gravis presents with increasing difficulty swallowing, weak speech, shortness of breath, and inability to hold her head upright. She recently developed pneumonia and was prescribed an antibiotic at an urgent-care clinic. Vital signs ● Temperature: 38.5°C ● Blood pressure: 132/78 mmHg ● Heart rate: 118/min ● Respiratory rate: 30/min ● Oxygen saturation: 91% on room air Physical examination She has bilateral ptosis, fatigable facial weakness, nasal speech, weak cough, and shallow respirations. Sensory examination is normal.
                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-129

                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-130

                                                                                                                                                                                                                                                                    Which feature is characteristic of myasthenia gravis?

                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-131

                                                                                                                                                                                                                                                                      Which examination finding represents the greatest immediate risk?

                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-132

                                                                                                                                                                                                                                                                        Which common factor may precipitate a myasthenic crisis?

                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-133

                                                                                                                                                                                                                                                                          Which bedside assessment is particularly important?

                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-134

                                                                                                                                                                                                                                                                            What is the most appropriate next step?

                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                              Important differentials ● Cholinergic crisis ● Guillain–Barré syndrome ● Botulism ● Brainstem stroke ● Lambert–Eaton syndrome ● Severe electrolyte disturbance NPLEX trap A normal pulse oximetry reading does not reliably exclude early neuromuscular respiratory failure.

                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                              3. Myasthenia Gravis Foundation of America. International consensus guidance for management of myasthenia gravis.
                                                                                                                                                                                                                                                                              30

                                                                                                                                                                                                                                                                              Acute Compartment Syndrome

                                                                                                                                                                                                                                                                              6 questions · Acute Clinical Reasoning & Prioritization

                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                              Patient profile A 29-year-old man presents six hours after sustaining a closed tibial fracture during a motor-vehicle collision. His lower leg was immobilized in a circumferential cast. He reports rapidly worsening pain despite opioid medication. Vital signs ● Temperature: 37.2°C ● Blood pressure: 142/86 mmHg ● Heart rate: 116/min ● Respiratory rate: 22/min Physical examination The lower leg is tense and swollen. Passive extension of the toes causes severe pain. Sensation between the first and second toes is reduced. The dorsalis pedis pulse remains palpable.
                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-135

                                                                                                                                                                                                                                                                              What is the most likely diagnosis?

                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-136

                                                                                                                                                                                                                                                                                Which is often the earliest important clinical feature?

                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-137

                                                                                                                                                                                                                                                                                  Does the presence of a distal pulse exclude compartment syndrome?

                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-138

                                                                                                                                                                                                                                                                                    Which examination finding indicates nerve compromise?

                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-139

                                                                                                                                                                                                                                                                                      What is the most appropriate immediate action?

                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-140

                                                                                                                                                                                                                                                                                        Which is a late and ominous finding?

                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                          Important differentials ● Deep-vein thrombosis ● Arterial injury ● Fracture-associated pain ● Cellulitis ● Necrotizing infection ● Peripheral nerve injury NPLEX trap Do not wait for loss of pulse. A palpable distal pulse does not rule out compartment syndrome.

                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                          3. American Academy of Orthopaedic Surgeons. Current clinical guidance and appropriate-use criteria.
                                                                                                                                                                                                                                                                                          31

                                                                                                                                                                                                                                                                                          Cardiac Tamponade

                                                                                                                                                                                                                                                                                          6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                                                                          Patient profile A 49-year-old man presents with progressive shortness of breath, chest pressure, weakness, and lightheadedness. He was diagnosed with metastatic lung cancer three months ago. Vital signs ● Temperature: 37.1°C ● Blood pressure: 84/62 mmHg ● Heart rate: 126/min ● Respiratory rate: 28/min ● Oxygen saturation: 92% on room air Physical examination The patient appears distressed. Neck veins are distended while he is sitting upright. Heart sounds are distant. Lungs are relatively clear. Systolic blood pressure decreases noticeably during inspiration.
                                                                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-141

                                                                                                                                                                                                                                                                                          What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-142

                                                                                                                                                                                                                                                                                            Which combination is traditionally called Beck triad?

                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-143

                                                                                                                                                                                                                                                                                              What is pulsus paradoxus?

                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-144

                                                                                                                                                                                                                                                                                                Which additional history most strongly increases suspicion for tamponade?

                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-145

                                                                                                                                                                                                                                                                                                  Which finding helps distinguish tamponade from left-sided cardiogenic pulmonary edema?

                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-146

                                                                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                      Important differentials ● Massive pulmonary embolism ● Tension pneumothorax ● Right ventricular infarction ● Constrictive pericarditis ● Severe heart failure NPLEX trap The complete Beck triad may be absent. Unexplained hypotension with jugular venous distension should prompt consideration of obstructive shock.

                                                                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                      3. American College of Cardiology/American Heart Association. Current aortic, pericardial, and vascular-disease guidance.
                                                                                                                                                                                                                                                                                                      32

                                                                                                                                                                                                                                                                                                      Acute Mesenteric Ischemia

                                                                                                                                                                                                                                                                                                      6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                                                                      Patient profile A 72-year-old woman presents with sudden severe central abdominal pain and nausea. She describes the pain as constant and unbearable. Medical history ● Atrial fibrillation ● Hypertension ● Peripheral arterial disease Medications ● Metoprolol ● She stopped taking her anticoagulant three weeks ago Vital signs ● Temperature: 37.4°C ● Blood pressure: 148/86 mmHg ● Heart rate: 118/min, irregularly irregular ● Respiratory rate: 24/min Physical examination The patient appears distressed. The abdomen is initially soft with only mild diffuse tenderness despite the severity of the reported pain.
                                                                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-147

                                                                                                                                                                                                                                                                                                      What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-148

                                                                                                                                                                                                                                                                                                        Which risk factor is most relevant?

                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-149

                                                                                                                                                                                                                                                                                                          Which phrase best describes the classic early examination pattern?

                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-150

                                                                                                                                                                                                                                                                                                            Which new finding would suggest bowel infarction or perforation?

                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-151

                                                                                                                                                                                                                                                                                                              Which alternative diagnosis is most likely when severe abdominal and back pain occurs with hypotension and a pulsatile abdominal mass?

                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-152

                                                                                                                                                                                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                  Important differentials ● Ruptured abdominal aortic aneurysm ● Bowel obstruction ● Perforated peptic ulcer ● Pancreatitis ● Acute cholecystitis ● Renal colic NPLEX trap A relatively benign early abdominal examination does not exclude catastrophic bowel ischemia.

                                                                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                  3. World Society of Emergency Surgery. Current emergency general-surgery guidance.
                                                                                                                                                                                                                                                                                                                  33

                                                                                                                                                                                                                                                                                                                  Adrenal Crisis

                                                                                                                                                                                                                                                                                                                  6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                                                                  Patient profile A 38-year-old woman with primary adrenal insufficiency presents with vomiting, diarrhea, profound weakness, abdominal pain, and dizziness. She developed influenza-like symptoms two days earlier and has been unable to keep her medication down. Medications ● Hydrocortisone ● Fludrocortisone Vital signs ● Temperature: 38.4°C ● Blood pressure: 78/46 mmHg ● Heart rate: 124/min ● Respiratory rate: 24/min ● Oxygen saturation: 97% Physical examination The patient is lethargic and dehydrated. Diffuse abdominal tenderness is present without rigidity. Hyperpigmentation is noted over the palmar creases and buccal mucosa.
                                                                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-153

                                                                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-154

                                                                                                                                                                                                                                                                                                                    Which event most likely precipitated this emergency?

                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-155

                                                                                                                                                                                                                                                                                                                      Which electrolyte pattern is commonly associated with primary adrenal insufficiency?

                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-156

                                                                                                                                                                                                                                                                                                                        Which physical finding supports primary rather than secondary adrenal insufficiency?

                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-157

                                                                                                                                                                                                                                                                                                                          Which competing diagnosis must also be considered in a febrile hypotensive patient?

                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-158

                                                                                                                                                                                                                                                                                                                            What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                              Important differentials ● Septic shock ● Hypovolemic shock ● Diabetic ketoacidosis ● Acute gastroenteritis ● Toxic ingestion ● Severe hypothyroidism NPLEX trap Do not delay emergency glucocorticoid treatment while awaiting cortisol results in a clinically unstable patient.

                                                                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                              3. Endocrine Society. Current primary adrenal-insufficiency guidance.
                                                                                                                                                                                                                                                                                                                              34

                                                                                                                                                                                                                                                                                                                              Guillain–Barré Syndrome

                                                                                                                                                                                                                                                                                                                              6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                                                                              Patient profile A 41-year-old man presents with progressive tingling and weakness beginning in both feet and ascending toward the thighs. One week earlier, he recovered from a diarrheal illness. Vital signs ● Temperature: 36.8°C ● Blood pressure: 138/84 mmHg ● Heart rate: 104/min ● Respiratory rate: 20/min ● Oxygen saturation: 97% Physical examination There is symmetric lower-extremity weakness, absent ankle and patellar reflexes, and mild distal paresthesia. Plantar responses are flexor. Cranial nerves are initially intact.
                                                                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-159

                                                                                                                                                                                                                                                                                                                              What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-160

                                                                                                                                                                                                                                                                                                                                Which examination finding most strongly supports this diagnosis?

                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-161

                                                                                                                                                                                                                                                                                                                                  Which finding would indicate impending respiratory compromise?

                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-162

                                                                                                                                                                                                                                                                                                                                    Which autonomic complication may occur?

                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-163

                                                                                                                                                                                                                                                                                                                                      Which finding would be less typical and should prompt reconsideration of the diagnosis?

                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-164

                                                                                                                                                                                                                                                                                                                                        What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                          Important differentials ● Spinal cord compression ● Transverse myelitis ● Myasthenia gravis ● Botulism ● Tick paralysis ● Severe electrolyte disturbance NPLEX trap Normal oxygen saturation does not exclude evolving neuromuscular respiratory failure.

                                                                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                          3. European Academy of Neurology/Peripheral Nerve Society. Current Guillain–Barré syndrome guideline.
                                                                                                                                                                                                                                                                                                                                          35

                                                                                                                                                                                                                                                                                                                                          Acute Limb Ischemia

                                                                                                                                                                                                                                                                                                                                          6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                                                                                                                          Patient profile A 68-year-old man with atrial fibrillation develops sudden severe pain in the left leg. He reports numbness and difficulty moving the foot. Medications ● Metoprolol ● He stopped anticoagulation because of bruising Vital signs ● Temperature: 36.9°C ● Blood pressure: 146/84 mmHg ● Heart rate: 112/min, irregularly irregular ● Respiratory rate: 20/min Physical examination The left foot is pale, cool, and mottled. The dorsalis pedis and posterior tibial pulses are absent. Capillary refill is markedly delayed. Sensation and motor strength are reduced.
                                                                                                                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-165

                                                                                                                                                                                                                                                                                                                                          What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-166

                                                                                                                                                                                                                                                                                                                                            Which underlying condition most likely caused this event?

                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-167

                                                                                                                                                                                                                                                                                                                                              Which set of findings represents the classic “six Ps”?

                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-168

                                                                                                                                                                                                                                                                                                                                                Which finding indicates a threatened limb?

                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-169

                                                                                                                                                                                                                                                                                                                                                  Which feature would be more consistent with deep-vein thrombosis?

                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-170

                                                                                                                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                      Important differentials ● Deep-vein thrombosis ● Compartment syndrome ● Phlegmasia cerulea dolens ● Acute neuropathy ● Severe vasospasm ● Aortic dissection with branch involvement NPLEX trap Do not apply compression or massage when acute arterial occlusion is suspected.

                                                                                                                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                      3. American College of Cardiology/American Heart Association. Current aortic, pericardial, and vascular-disease guidance.
                                                                                                                                                                                                                                                                                                                                                      36

                                                                                                                                                                                                                                                                                                                                                      Retinal Detachment

                                                                                                                                                                                                                                                                                                                                                      6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                                                                                                                      Patient profile A 57-year-old highly myopic man reports sudden flashes of light in the left eye followed by numerous new floaters. He now sees a dark curtain moving across the lateral part of his visual field. He denies eye pain. Vital signs Normal. Physical examination Visual acuity is reduced in the affected eye. The external eye is not red. Pupils are equal, although a relative afferent pupillary defect may be present.
                                                                                                                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-171

                                                                                                                                                                                                                                                                                                                                                      What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-172

                                                                                                                                                                                                                                                                                                                                                        Which historical factor increases the risk?

                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-173

                                                                                                                                                                                                                                                                                                                                                          Which feature distinguishes retinal detachment from acute angle-closure glaucoma?

                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-174

                                                                                                                                                                                                                                                                                                                                                            What is the meaning of a “curtain” moving across the vision?

                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-175

                                                                                                                                                                                                                                                                                                                                                              Which additional symptom may suggest vitreous hemorrhage or a retinal tear?

                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-176

                                                                                                                                                                                                                                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                  Important differentials ● Posterior vitreous detachment ● Vitreous hemorrhage ● Ocular migraine ● Retinal vascular occlusion ● Optic neuritis ● Acute angle-closure glaucoma NPLEX trap Absence of eye pain does not indicate that sudden visual loss is benign.

                                                                                                                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                  3. American Academy of Ophthalmology. Current Preferred Practice Pattern guidance.
                                                                                                                                                                                                                                                                                                                                                                  37

                                                                                                                                                                                                                                                                                                                                                                  Spinal Epidural Abscess

                                                                                                                                                                                                                                                                                                                                                                  6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                                                                                                                  Patient profile A 45-year-old man presents with severe midline back pain, fever, and progressive weakness in both legs. Medical history ● Injection-drug use ● Recent skin abscess ● Type 2 diabetes mellitus Vital signs ● Temperature: 39.1°C ● Blood pressure: 102/66 mmHg ● Heart rate: 116/min ● Respiratory rate: 22/min Physical examination There is marked tenderness over the lower thoracic spine. Hip flexion and knee extension are weak bilaterally. Sensation is reduced below the umbilicus. Reflexes are brisk in the lower extremities.
                                                                                                                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-177

                                                                                                                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-178

                                                                                                                                                                                                                                                                                                                                                                    Which historical factor most increases suspicion?

                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-179

                                                                                                                                                                                                                                                                                                                                                                      Which examination finding suggests spinal cord involvement?

                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-180

                                                                                                                                                                                                                                                                                                                                                                        Which additional question is most important?

                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-181

                                                                                                                                                                                                                                                                                                                                                                          Which intervention is contraindicated?

                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-182

                                                                                                                                                                                                                                                                                                                                                                            What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                              Important differentials ● Vertebral osteomyelitis ● Discitis ● Epidural hematoma ● Metastatic spinal cord compression ● Cauda equina syndrome ● Mechanical back pain NPLEX trap The full triad of fever, back pain, and neurological deficit may not be present early. Risk factors and progressive symptoms matter.

                                                                                                                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                              3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                                                                                                                                                                                                                                                                                                                              4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                                                                                                                                                                                                                                                                                                                              38

                                                                                                                                                                                                                                                                                                                                                                              Preeclampsia With Severe Features

                                                                                                                                                                                                                                                                                                                                                                              6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                                                                                                                              Patient profile A 32-year-old woman at 35 weeks’ gestation presents with severe headache, blurred vision, right-upper-quadrant pain, and rapidly increasing swelling of her hands and face. Vital signs ● Temperature: 36.8°C ● Blood pressure: 174/112 mmHg ● Heart rate: 96/min ● Respiratory rate: 20/min ● Oxygen saturation: 97% Physical examination She has brisk reflexes with two beats of ankle clonus. Facial and hand edema are present. Right-upper-quadrant tenderness is noted.
                                                                                                                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-183

                                                                                                                                                                                                                                                                                                                                                                              What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-184

                                                                                                                                                                                                                                                                                                                                                                                Which finding most strongly indicates severe disease?

                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-185

                                                                                                                                                                                                                                                                                                                                                                                  What is the significance of right-upper-quadrant pain?

                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-186

                                                                                                                                                                                                                                                                                                                                                                                    Which finding suggests increased seizure risk?

                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-187

                                                                                                                                                                                                                                                                                                                                                                                      What is eclampsia?

                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-188

                                                                                                                                                                                                                                                                                                                                                                                        What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                          Important differentials ● Gestational hypertension ● Migraine ● Intracranial hemorrhage ● Acute fatty liver of pregnancy ● HELLP syndrome ● Thrombotic thrombocytopenic purpura NPLEX trap Edema is neither required nor sufficient for diagnosis. Severe blood pressure and end-organ symptoms determine urgency.

                                                                                                                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                          3. American College of Obstetricians and Gynecologists. Current practice guidance.
                                                                                                                                                                                                                                                                                                                                                                                          39

                                                                                                                                                                                                                                                                                                                                                                                          Delirium Due to Infection in an Older Adult

                                                                                                                                                                                                                                                                                                                                                                                          6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                                                                                                                                                                          Patient profile An 82-year-old woman is brought by her daughter because of sudden confusion, agitation, and visual hallucinations that began yesterday. She was independent and cognitively intact three days ago. Medical history ● Hypertension ● Osteoarthritis ● Mild urinary incontinence Medications ● Amlodipine ● Acetaminophen ● Recently started diphenhydramine for sleep Vital signs ● Temperature: 38.3°C ● Blood pressure: 102/64 mmHg ● Heart rate: 110/min ● Respiratory rate: 24/min ● Oxygen saturation: 93% Physical examination Attention fluctuates during the interview. She cannot recite the months backward. Suprapubic tenderness is present. No focal neurological deficit is detected.
                                                                                                                                                                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-189

                                                                                                                                                                                                                                                                                                                                                                                          What is the most likely syndrome?

                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-190

                                                                                                                                                                                                                                                                                                                                                                                            Which finding best distinguishes delirium from dementia?

                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-191

                                                                                                                                                                                                                                                                                                                                                                                              Which factor may be contributing to the presentation?

                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-192

                                                                                                                                                                                                                                                                                                                                                                                                Which underlying cause is most likely in this patient?

                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-193

                                                                                                                                                                                                                                                                                                                                                                                                  Which finding would require immediate stroke evaluation?

                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-194

                                                                                                                                                                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                      Important differentials ● Dementia ● Stroke ● Sepsis ● Medication toxicity ● Hypoglycemia ● Electrolyte disturbance ● Urinary retention ● Hypoxia NPLEX trap Do not attribute acute confusion in an older adult to age or chronic dementia without searching for a reversible medical cause.

                                                                                                                                                                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                      3. American Psychiatric Association. DSM-5-TR and current practice guidance.
                                                                                                                                                                                                                                                                                                                                                                                                      4. Goldfrank’s Toxicologic Emergencies. Current edition.
                                                                                                                                                                                                                                                                                                                                                                                                      40

                                                                                                                                                                                                                                                                                                                                                                                                      Achilles Tendon Rupture

                                                                                                                                                                                                                                                                                                                                                                                                      6 questions · Advanced Multisystem Clinical Diagnosis

                                                                                                                                                                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                      Patient profile A 44-year-old recreational tennis player reports sudden pain in the back of the left ankle while pushing off to reach a ball. He felt as though someone had kicked him and heard a snapping sound. Physical examination There is swelling and tenderness several centimetres above the calcaneus. A palpable tendon gap is present. The patient cannot perform a single-leg heel raise.
                                                                                                                                                                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-195

                                                                                                                                                                                                                                                                                                                                                                                                      What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-196

                                                                                                                                                                                                                                                                                                                                                                                                        Which examination test is most appropriate?

                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-197

                                                                                                                                                                                                                                                                                                                                                                                                          What constitutes a positive Thompson test?

                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-198

                                                                                                                                                                                                                                                                                                                                                                                                            Which medication exposure may increase the risk of tendon rupture?

                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-199

                                                                                                                                                                                                                                                                                                                                                                                                              Which feature helps distinguish rupture from a simple ankle sprain?

                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-200

                                                                                                                                                                                                                                                                                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                  Important differentials ● Gastrocnemius strain ● Plantaris rupture ● Retrocalcaneal bursitis ● Ankle sprain ● Deep-vein thrombosis ● Calcaneal fracture NPLEX trap Some plantar flexion may remain because other muscles can still act. Preserved weak movement does not exclude complete Achilles rupture.

                                                                                                                                                                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                  3. American Academy of Orthopaedic Surgeons. Current clinical guidance and appropriate-use criteria.
                                                                                                                                                                                                                                                                                                                                                                                                                  41

                                                                                                                                                                                                                                                                                                                                                                                                                  Tension Pneumothorax

                                                                                                                                                                                                                                                                                                                                                                                                                  6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                  Patient profile A 27-year-old man is brought to the clinic after a motorcycle collision. He reports severe right-sided chest pain and rapidly worsening shortness of breath. Vital signs ● Blood pressure: 78/48 mmHg ● Heart rate: 138/min ● Respiratory rate: 34/min ● Oxygen saturation: 82% on room air Physical examination The patient is distressed and cyanotic. The right side of the chest expands less than the left. Breath sounds are absent on the right, and percussion is hyperresonant. Neck veins are distended. The trachea appears displaced toward the left.
                                                                                                                                                                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-201

                                                                                                                                                                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-202

                                                                                                                                                                                                                                                                                                                                                                                                                    What is the principal mechanism causing hypotension?

                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-203

                                                                                                                                                                                                                                                                                                                                                                                                                      Which finding best distinguishes tension pneumothorax from a simple pneumothorax?

                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-204

                                                                                                                                                                                                                                                                                                                                                                                                                        Which finding may be absent until late?

                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-205

                                                                                                                                                                                                                                                                                                                                                                                                                          What is the most appropriate immediate action?

                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-206

                                                                                                                                                                                                                                                                                                                                                                                                                            Which alternative diagnosis may also produce hypotension, jugular venous distension, and clear lungs?

                                                                                                                                                                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                              NPLEX trap Do not delay decompression for radiographic confirmation in a clinically unstable patient.

                                                                                                                                                                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                              42

                                                                                                                                                                                                                                                                                                                                                                                                                              Acute Ascending Cholangitis

                                                                                                                                                                                                                                                                                                                                                                                                                              6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                              Patient profile A 64-year-old woman presents with fever, shaking chills, right-upper-quadrant pain, nausea, and yellowing of her eyes. Medical history ● Gallstones ● Type 2 diabetes mellitus Vital signs ● Temperature: 39.3°C ● Blood pressure: 86/54 mmHg ● Heart rate: 126/min ● Respiratory rate: 26/min ● Oxygen saturation: 95% Physical examination The patient is jaundiced, confused, and diaphoretic. There is right-upper-quadrant tenderness without marked abdominal rigidity.
                                                                                                                                                                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-207

                                                                                                                                                                                                                                                                                                                                                                                                                              What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-208

                                                                                                                                                                                                                                                                                                                                                                                                                                Which three findings make up Charcot triad?

                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-209

                                                                                                                                                                                                                                                                                                                                                                                                                                  Which additional findings constitute Reynolds pentad?

                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-210

                                                                                                                                                                                                                                                                                                                                                                                                                                    Which underlying process most commonly causes this condition?

                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-211

                                                                                                                                                                                                                                                                                                                                                                                                                                      Which finding would be more typical of uncomplicated biliary colic?

                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-212

                                                                                                                                                                                                                                                                                                                                                                                                                                        What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                          Important differentials ● Acute cholecystitis ● Gallstone pancreatitis ● Acute hepatitis ● Liver abscess ● Peptic-ulcer disease ● Right-lower-lobe pneumonia NPLEX trap Right-upper-quadrant pain with fever and jaundice is not uncomplicated gallbladder pain.

                                                                                                                                                                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                          3. Tokyo Guidelines. Current diagnostic and severity guidance for acute cholangitis and cholecystitis.
                                                                                                                                                                                                                                                                                                                                                                                                                                          43

                                                                                                                                                                                                                                                                                                                                                                                                                                          Neutropenic Sepsis

                                                                                                                                                                                                                                                                                                                                                                                                                                          6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                          Patient profile A 56-year-old woman receiving chemotherapy for acute leukemia presents with weakness, chills, and a temperature of 38.2°C. Her last chemotherapy treatment was eight days ago. Vital signs ● Temperature: 38.2°C ● Blood pressure: 90/56 mmHg ● Heart rate: 120/min ● Respiratory rate: 24/min ● Oxygen saturation: 94% Physical examination The patient appears pale and lethargic. Oral ulcers are present. There is no focal lung finding, abdominal rigidity, or obvious skin infection.
                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-213

                                                                                                                                                                                                                                                                                                                                                                                                                                          What is the most concerning diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-214

                                                                                                                                                                                                                                                                                                                                                                                                                                            Which history detail is most relevant?

                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-215

                                                                                                                                                                                                                                                                                                                                                                                                                                              Why may focal examination findings be minimal?

                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-216

                                                                                                                                                                                                                                                                                                                                                                                                                                                Which temperature pattern should trigger urgent evaluation in a chemotherapy patient?

                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-217

                                                                                                                                                                                                                                                                                                                                                                                                                                                  Which action is inappropriate?

                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-218

                                                                                                                                                                                                                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                      Important differentials ● Chemotherapy adverse effects ● Tumour lysis syndrome ● Viral infection ● Pneumonia ● Catheter-associated infection ● Mucositis-related bacteremia NPLEX trap Do not be reassured by the absence of focal infection findings in a neutropenic patient.

                                                                                                                                                                                                                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                      3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                      4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                      44

                                                                                                                                                                                                                                                                                                                                                                                                                                                      Infective Endocarditis

                                                                                                                                                                                                                                                                                                                                                                                                                                                      6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                      Patient profile A 39-year-old man presents with three weeks of fever, fatigue, night sweats, reduced appetite, and unintentional weight loss. Medical history ● Injection-drug use ● Previous skin abscess ● No known congenital heart disease Vital signs ● Temperature: 38.7°C ● Blood pressure: 108/66 mmHg ● Heart rate: 112/min ● Respiratory rate: 20/min Physical examination A new systolic murmur is heard. Several tender red nodules are present on the finger pads. Small linear hemorrhages are visible beneath the fingernails.
                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-219

                                                                                                                                                                                                                                                                                                                                                                                                                                                      What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-220

                                                                                                                                                                                                                                                                                                                                                                                                                                                        What are the tender nodules on the finger pads called?

                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-221

                                                                                                                                                                                                                                                                                                                                                                                                                                                          Which lesions are classically painless and found on the palms or soles?

                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-222

                                                                                                                                                                                                                                                                                                                                                                                                                                                            Which acute complication requires immediate neurological assessment?

                                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-223

                                                                                                                                                                                                                                                                                                                                                                                                                                                              Which diagnostic step is particularly important before antimicrobial treatment when feasible?

                                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-224

                                                                                                                                                                                                                                                                                                                                                                                                                                                                What is the most appropriate disposition?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Important differentials ● Occult malignancy ● Tuberculosis ● Autoimmune disease ● Acute rheumatic fever ● Viral infection ● Nonbacterial thrombotic endocarditis NPLEX trap A murmur may be absent early. Persistent unexplained fever in a high-risk patient still requires consideration of endocarditis.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  3. Infectious Diseases Society of America. Current clinical practice guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  4. Surviving Sepsis Campaign. Current sepsis and septic-shock guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  45

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Peritonsillar Abscess

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Patient profile A 22-year-old woman presents with severe unilateral throat pain, fever, difficulty swallowing, and a muffled voice. She reports that the pain radiates toward the left ear. Vital signs ● Temperature: 39.0°C ● Blood pressure: 118/72 mmHg ● Heart rate: 116/min ● Respiratory rate: 20/min ● Oxygen saturation: 97% Physical examination The patient has difficulty opening her mouth. The left tonsillar region is swollen, and the uvula is displaced toward the right. She is drooling but has no stridor.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-225

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-226

                                                                                                                                                                                                                                                                                                                                                                                                                                                                    What is trismus?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-227

                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Which finding indicates possible airway compromise?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-228

                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Which diagnosis should be considered when there is neck stiffness, posterior pharyngeal swelling, and limited neck extension?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-229

                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Which examination action should be performed cautiously?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-230

                                                                                                                                                                                                                                                                                                                                                                                                                                                                            What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Important differentials ● Epiglottitis ● Retropharyngeal abscess ● Severe tonsillitis ● Diphtheria ● Infectious mononucleosis ● Dental abscess NPLEX trap A muffled voice, trismus, drooling, or uvular deviation indicates more than uncomplicated pharyngitis.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              3. American Academy of Otolaryngology–Head and Neck Surgery. Current educational guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              46

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Suspected Physical Abuse in a Child

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Patient profile A 3-year-old boy is brought for assessment of bruising. His caregiver states that the child “fell while walking across the carpet.” Physical examination Bruises are present on the ears, neck, inner thighs, back, and upper arms. Some bruises are yellow-brown, while others are dark blue. A loop-shaped mark is present on the posterior thigh. The child becomes silent and withdrawn when the caregiver enters the room.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-231

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Which finding is most concerning for non-accidental injury?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-232

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Why is the caregiver’s explanation concerning?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-233

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  What does a loop-shaped bruise suggest?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-234

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Which additional history should be obtained?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-235

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Which action is inappropriate?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-236

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Important differentials ● Accidental trauma ● Bleeding disorder ● Cultural or therapeutic skin practices ● Connective-tissue disorder ● Vasculitis ● Dermatological disease NPLEX trap The clinician does not need to prove abuse before making a mandated report. Reasonable suspicion is sufficient.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          3. American Academy of Pediatrics. Current guidance for evaluation of suspected child physical abuse.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          47

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Central Retinal Artery Occlusion

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Patient profile A 71-year-old man presents with sudden painless loss of vision in the right eye. The loss occurred 45 minutes ago. Medical history ● Atrial fibrillation ● Carotid artery disease ● Hypertension ● Tobacco use Physical examination Visual acuity is markedly reduced in the right eye. A relative afferent pupillary defect is present. The eye is not red or painful. Funduscopic examination suggests a pale retina with a central red fovea.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 1 of 6NPLEX-PCD-237

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 2 of 6NPLEX-PCD-238

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            What is the classic funduscopic appearance?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 3 of 6NPLEX-PCD-239

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Which systemic source should be investigated?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 4 of 6NPLEX-PCD-240

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Which feature distinguishes this condition from acute angle-closure glaucoma?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 5 of 6NPLEX-PCD-241

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Why should a neurological assessment also be performed?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 6 of 6NPLEX-PCD-242

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Important differentials ● Retinal detachment ● Vitreous hemorrhage ● Central retinal vein occlusion ● Optic neuritis ● Giant cell arteritis ● Ocular migraine NPLEX trap Sudden painless visual loss is an emergency even when the eye appears externally normal.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      3. American Heart Association/American Stroke Association. Current acute ischemic stroke guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      4. Canadian Stroke Best Practices. Current recommendations.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      48

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Femoral Neck Fracture

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Patient profile An 81-year-old woman falls from standing height and develops severe left hip and groin pain. She cannot bear weight. Medical history ● Osteoporosis ● Previous vertebral compression fracture ● Long-term corticosteroid use Vital signs ● Temperature: 36.8°C ● Blood pressure: 146/82 mmHg ● Heart rate: 102/min ● Respiratory rate: 18/min Physical examination The left leg appears shortened and externally rotated. Gentle movement of the hip produces severe pain. Distal pulses and sensation are intact.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 1 of 6NPLEX-PCD-243

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 2 of 6NPLEX-PCD-244

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Which risk factor is most clinically relevant?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 3 of 6NPLEX-PCD-245

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Which complication is particularly associated with an intracapsular femoral-neck fracture?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 4 of 6NPLEX-PCD-246

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Can a patient with an impacted hip fracture sometimes still bear limited weight?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 5 of 6NPLEX-PCD-247

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Which additional issue should be assessed after the fall?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 6 of 6NPLEX-PCD-248

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Important differentials ● Pelvic fracture ● Hip dislocation ● Acetabular fracture ● Severe osteoarthritis ● Greater-trochanteric pain syndrome ● Lumbar radiculopathy NPLEX trap Normal initial radiographs do not always exclude an occult hip fracture when clinical suspicion remains high.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  3. American Academy of Orthopaedic Surgeons. Current clinical guidance and appropriate-use criteria.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  49

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Serotonin Syndrome

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Patient profile A 35-year-old man presents with agitation, sweating, diarrhea, tremor, and fever. He takes sertraline and began linezolid two days ago for a resistant skin infection. He also uses an over-the-counter product containing dextromethorphan. Vital signs ● Temperature: 39.2°C ● Blood pressure: 168/94 mmHg ● Heart rate: 132/min ● Respiratory rate: 26/min ● Oxygen saturation: 96% Physical examination The patient is restless and confused. Pupils are dilated. Tremor, inducible ankle clonus, ocular clonus, and marked lower-extremity hyperreflexia are present.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 1 of 6NPLEX-PCD-249

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  What is the most likely diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 2 of 6NPLEX-PCD-250

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Which examination finding is especially characteristic?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 3 of 6NPLEX-PCD-251

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Which medication combination likely precipitated the syndrome?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 4 of 6NPLEX-PCD-252

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Which feature favours serotonin syndrome over neuroleptic malignant syndrome?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Question 5 of 6NPLEX-PCD-253

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Which complication requires immediate attention?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Question 6 of 6NPLEX-PCD-254

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Important differentials ● Neuroleptic malignant syndrome ● Anticholinergic toxicity ● Sympathomimetic intoxication ● Sepsis ● Thyroid storm ● Malignant hyperthermia NPLEX trap Fever and confusion alone are nonspecific. Clonus and hyperreflexia strongly support serotonin toxicity.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              3. American Psychiatric Association. DSM-5-TR and current practice guidance.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              4. Goldfrank’s Toxicologic Emergencies. Current edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              50

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Inflammatory Breast Cancer

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              6 questions · Safety, Emergencies & Referral Decisions

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              GEA: DiagnosisSEA: Physical & Clinical Diagnosis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Clinical case
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Patient profile A 46-year-old woman presents with rapidly progressive enlargement and redness of the left breast over six weeks. She reports heaviness but little pain. Antibiotics prescribed for presumed mastitis produced no improvement. She is not pregnant or breastfeeding. Physical examination The left breast is enlarged, warm, and diffusely erythematous. The skin has a thickened “orange-peel” appearance. The nipple is newly retracted. Firm, enlarged left axillary lymph nodes are present. No discrete breast mass is easily palpated.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Question 1 of 6NPLEX-PCD-255

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              What is the most concerning diagnosis?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Question 2 of 6NPLEX-PCD-256

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                What causes the peau d’orange appearance?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Question 3 of 6NPLEX-PCD-257

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Which feature makes uncomplicated lactational mastitis less likely?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Question 4 of 6NPLEX-PCD-258

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Does the absence of a clearly palpable mass exclude breast malignancy?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Question 5 of 6NPLEX-PCD-259

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Which lymph-node finding is most concerning?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Question 6 of 6NPLEX-PCD-260

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        What is the most appropriate next step?

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Next case

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        Answer and clinical rationale

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        References

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Open case review, differentials, clinical sequence, or NPLEX trap
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Important differentials ● Lactational or non-lactational mastitis ● Breast abscess ● Locally advanced breast carcinoma ● Contact dermatitis ● Fat necrosis ● Congestive breast edema NPLEX trap Persistent inflammatory breast changes that do not respond appropriately to antimicrobial treatment require investigation for malignancy.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Reference framework

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. NPLEX Part II Clinical Science Examinations: Blueprint and Study Guide. Revised March 2026; applicable to the August 2026 administration.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Merck Manual Professional Edition. Relevant clinical topic; current online edition.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          3. National Comprehensive Cancer Network. Current clinical practice guidelines in oncology.

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