Pathology - USMLE Step 1 - Exam - Qbank 6
A 58 year old woman with a long history of alcoholism presents with diarrhea, general weakness, and a 9lb weight loss in the past 3 months. Further history reveals that she has been having difficulties driving at night as well as episodic upper abdominal pain not relieved with antacids or proton pump inhibitors. Laboratory studies reveal a serum ionized calcium of 3.5mg/dL (N=4.5-5.6mg/dL); PT of 30 seconds (N=11-15seconds); PTT of 60 seconds (N=25-40seconds). What is the most likely etiology of this patient’s diarrhea?
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