Coagulation Disorders USMLE Step 1 Practice Question
A 27-year-old woman presents with petechiae and easy bruising 2 weeks after recovering from a viral illness. She has no fever, neurologic symptoms, or renal dysfunction. Laboratory studies show platelet count 14,000/mm3 with normal PT and PTT. Bone marrow biopsy demonstrates increased megakaryocytes. Which of the following is the most likely diagnosis?
Answer choices
- Avon Willebrand disease
- BThrombotic thrombocytopenic purpura
- CDisseminated intravascular coagulation
- DImmune thrombocytopeniaCorrect answer
- EHemophilia A
- FDrug-induced thrombocytopenia from acetaminophen
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