The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 38-year-old man presents with progressive tiredness and shortness of breath on exertion. Past medical history is significant for peptic ulcer disease diagnosed 2 years ago for which he is not compliant with his medications. He reports a 10-pack-year smoking history and occasionally alcohol use. His vital signs include: temperature 37.1°C (98.7°F), blood pressure 142/91 mm Hg, pulse 98/min. Physical examination is unremarkable. Laboratory findings are significant for the following: Hemoglobin 9.7 g/dL Hematocrit 29.1% Red cell count 3.7 million/mm3 Mean corpuscular volume (MCV) 71 μm3 Mean corpuscular hemoglobin (MCH) 21.3 pg/cell Mean corpuscular hemoglobin concentration (MCHC) 28.4 Hb/cell Reticulocyte count 0.2 % Red cell distribution width (RDW) 17.8 (ref: 11.5–14.5%) White blood cell count 8100/mm3 Platelet count 420,000/mm3 Iron studies show: Total iron binding capacity (TIBC) 620 μg/dL Transferrin saturation 9% Which of the following findings would most likely be found on a bone marrow biopsy in this patient?   (A) Hypocellularity with fatty infiltration   (B) ↓ hemosiderin stores   (C) Ringed sideroblasts   (D) Myeloblasts with immature precursors
['(B) ↓ hemosiderin stores <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hypocellularity with fatty infiltration \n (B) ↓ hemosiderin stores \n (C) Ringed sideroblasts \n (D) Myeloblasts with immature precursors <> possible answers', '  A 38-year-old man presents with progressive tiredness and shortness of breath on exertion. Past medical history is significant for peptic ulcer disease diagnosed 2 years ago for which he is not compliant with his medications. He reports a 10-pack-year smoking history and occasionally alcohol use. His vital signs include: temperature 37.1°C (98.7°F), blood pressure 142/91 mm Hg, pulse 98/min. Physical examination is unremarkable. Laboratory findings are significant for the following:\nHemoglobin 9.7 g/dL\nHematocrit 29.1%\nRed cell count 3.7 million/mm3\nMean corpuscular volume (MCV) 71 μm3\nMean corpuscular hemoglobin (MCH) 21.3 pg/cell\nMean corpuscular hemoglobin concentration (MCHC) 28.4 Hb/cell\nReticulocyte count 0.2 %\nRed cell distribution width (RDW) 17.8 (ref: 11.5–14.5%)\nWhite blood cell count 8100/mm3\nPlatelet count 420,000/mm3\nIron studies show:\nTotal iron binding capacity (TIBC) 620 μg/dL\nTransferrin saturation 9%\nWhich of the following findings would most likely be found on a bone marrow biopsy in this patient? <> context@']