Causes of Chronic Diarrhea - Differential Diagnosis

Osmotic

 • Food/Drink: Lactose intolerance, Artificial sweeteners (e.g. sorbitol, high fructose corn syrup)

 • Medications: Acarbose, Mg hydroxide, Lactulose

 • Laxative abuse

Secretory:

 • Microscopic colitis

 • Medications: NSAlDs, Colchicine

 • Neuroendocrine tumors: Carcinoid syndrome, Gastrinoma (a.k.a. ZE syndrome)

Malabsorptive:

 • Celiac disease (a.k.a. "celiac sprue")

 • Pancreatic insufficiency: Chronic pancreatitis, Cystic fibrosis

 • Tropical sprue

 • Medications (a.k.a. "drug-induced enteropathy"): Olmesartan

Hypermotility:

 • Irritable bowel syndrome (IBS)

 • Hyperthyroidism

Inflammatory - Infectious:

 • Viral: AIDS enteritis, CMV

 • Mycobacterial: Tuberculosis, MAC

Inflammatory - Non-infectious:

 • Inflammatory bowel disease (IBD): Ulcerative colitis, Crohn's disease

 • Radiation enteritis/proctitis



- Dr. Eric Strong @DrEricStrong - Strong Medicine https://www.youtube.com/c/EricsMedicalLectures/



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