Pathology - USMLE Step 1 - Exam - Qbank 2
A 25-year-old woman has a routine, pre-employment physical examination. Laboratory studies include:Hemoglobin: 11.3 g/dLHematocrit: 34%Erythrocyte count: 5.2 million/mm3Mean corpuscular volume: 65 μm3Follow-up laboratory studies show that the serum iron concentration and iron-binding capacity are within the reference ranges. Hemoglobin electrophoresis shows increased hemoglobin A2 (5%). Which of the following is the most likely diagnosis?
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