A 42-year-old woman comes to the physician because of increasing fatigue and difficulty concentrating at work for the past 2 months. She has hypertension and a 22-year history of Crohn disease. She has been hospitalized and treated for acute exacerbations involving strictures multiple times in the past. She has not had significant gastrointestinal symptoms in over a year. Current medications include mesalamine, thiazide, and bisoprolol. Her temperature is 37.2°C (99.0°F), pulse is 72/min, and blood pressure is 140/90 mm Hg. Examination shows pale conjunctivae and a soft abdomen. Rectal examination is unremarkable. Laboratory studies show:
Hemoglobin 9.4 g/dL
Mean corpuscular volume 112 μm3
Mean corpuscular hemoglobin 37.2 pg/cell
Leukocyte count 8700/mm3
Platelet count 150,000/mm3
Erythrocyte sedimentation rate 42 mm/h
Serum
Ferritin 88 ng/mL
Iron 117 μg/dL
Thyroid-stimulating hormone 3.2 μU/mL
Thyroxine 7 μg/dL
Further evaluation of this patient is most likely to show which of the following findings?
Selecciona una de las siguientes respuestas posibles: