Pathology - USMLE Step 1 - Exam - Qbank 1
An otherwise healthy 26-year-old woman has had petechiae on her legs during the last 24 hours. Laboratory studies show: Hemoglobin: 13.1 g/dL Hematocrit: 39.7% Leukocyte count: 8500/mm3 Neutrophils: 65% Lymphocytes: 30% Monocytes: 5% Mean corpuscular volume: 82.2μm3 Platelet count: 20,000/mm3A peripheral blood smear shows normal red cell morphology; a bone marrow smear shows mature megakaryocytic hyperplasia. Which of the following is the most likely diagnosis?
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