NEET PG / USMLE – MCQ 32

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 82.2 μm3
Platelet count 20,000/mm3
A 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?
(A) Acute megakaryocytic leukemia
(B) Acute myelogenous leukemia
(C) Aplastic anemia
(D) Immune thrombocytopenic purpura
(E) Epstein-Barr viral infection
(F) Papovavirus infection
(G) Thrombotic thrombocytopenic purpura

Correct answer : (D) Immune thrombocytopenic purpura

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NEET PG / USMLE – MCQ 31

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