<prompt> Which of the following conditions does not cause secretory diarrhea?Medullary carcinoma of thyroidSomatostatinomaCarcinoid syndromeZollinger-Elison syndrome  <response>: Somatostatinoma causes steatorrhea Chronic Diarrheas - A summary Type Clues Examples Secretory diarrheas stool volume 1Ld; little change with fasting, normal stool osmotic gap. Hormone-producing tumours Carcinoid syn., Zollinger-Ellison syn., VIPomas, medullary thyroid carcinoma, villous adenoma of the rectum, microscopic colitis, choleric diarrhea endogenous laxatives, dihydroxy bile acids, Addisons disease, chronic ethanol ingestion, Steatorrhea causes Greasy, foul-smelling, difficult-to-flush diarrhea often aw weight loss and nutritional deficiencies, fecal output Malabsorption Abetalipoproteinemia, bacterial overgrowth, celiac sprue, lactase deficiency, pancreatic insufficiency, sho bowel syn., Whipples disease, somatostatinoma Osmotic diarrheas Stool volume with fasting, stool osmotic gap. Osmotic laxatives Mg2, PO4-3, SO4-2 Lactase and other disaccharide deficiencies Nonabsorbable carbohydrates sorbitol, lactulose, polyethylene glycol Inflammatory diarrheas Fever, hematochezia, abdominal pain Crohns disease, ulcerative colitis, radiation enterocolitis, eosinophilic gastroenteritis, infections aw AIDS, malignancy lymphoma, adenocarcinoma Diarrheas due to altered intestinal motility Systemic diseases or prior abdominal surgery Irritable bowel syn., fecal impaction, neurologic diseases, systemic diseases scleroderma, DM, hypehyroidism Iatrogenic causes Cholecystectomy, ileal resection, bariatric surgery, vagotomy, fundoplication Ref - Harrisons internal medicine 20e pg 264, 597t, 599, 601, 609 