Abstract
Question: A 57-year-old woman was referred for analysis of iron-deficiency anemia. Five months earlier she had underwent right lower lobectomy for stage 1a non–small cell lung cancer. She did not experience melena or rectal blood loss, nor were there any other abdominal symptoms. Except for a thoracotomy scar, physical examination was unremarkable. Her laboratory studies showed an hemoglobin of 10.8 g/dL. Mean corpuscular volume was 71 fL and serum ferritin was 11 ng/mL. Esophagogastroduodenoscopy showed no abnormalities, whereas ileocolonoscopy revealed mild diverticulosis of the sigmoid, without signs of inflammation.
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