The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 54-year-old woman presents with fatigue, malaise, and shortness of breath over the past 5 months. Past medical history is significant for rheumatoid arthritis diagnosed 23 years ago for which she takes naproxen as needed. Her vital signs include: temperature 36.9°C (98.4°F), blood pressure 135/88 mm Hg, pulse 92/min. Physical examination is significant for conjunctival pallor and bilateral ulnar deviation of the metacarpophalangeal joints. Laboratory findings are significant for the following: Hemoglobin 9.2 g/dL Mean corpuscular volume 76 fL Leukocyte count 7,000/mm3 Platelet count 220,000/mm3 Serum ferritin 310 ng/mL Erythrocyte sedimentation rate 85 mm/h Which of the following is a feature of this patient's anemia?   (A) ↑ serum transferrin receptors   (B) ↑ transferrin saturation   (C) Upregulation of hepcidin   (D) ↑ reticulocyte count
['(C) Upregulation of hepcidin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) ↑ serum transferrin receptors \n (B) ↑ transferrin saturation \n (C) Upregulation of hepcidin \n (D) ↑ reticulocyte count <> possible answers', "  A 54-year-old woman presents with fatigue, malaise, and shortness of breath over the past 5 months. Past medical history is significant for rheumatoid arthritis diagnosed 23 years ago for which she takes naproxen as needed. Her vital signs include: temperature 36.9°C (98.4°F), blood pressure 135/88 mm Hg, pulse 92/min. Physical examination is significant for conjunctival pallor and bilateral ulnar deviation of the metacarpophalangeal joints. Laboratory findings are significant for the following:\nHemoglobin 9.2 g/dL\nMean corpuscular volume 76 fL\nLeukocyte count 7,000/mm3\nPlatelet count 220,000/mm3\nSerum ferritin 310 ng/mL\nErythrocyte sedimentation rate 85 mm/h\nWhich of the following is a feature of this patient's anemia? <> context@"]