Watery diarrhea |
Osmotic diarrhea |
Carbohydrate malabsorption |
Osmotic laxatives (eg, Mg++, PO4–3, SO4–2) |
Secretory diarrhea |
Bacterial toxins |
Bile acid malabsorption |
IBD (some cases) |
Crohn disease |
Microscopic colitis |
Collagenous colitis |
Lymphocytic colitis |
Medications and toxins |
Disordered motility |
Diabetic autonomic neuropathy |
IBS |
Postsympathectomy diarrhea |
Postvagotomy diarrhea |
Endocrinopathies |
Addison's disease |
Neuroendocrine tumors |
Hyperthyroidism |
Mastocytosis |
Medullary carcinoma of the thyroid |
Idiopathic secretory diarrhea (epidemic and sporadic) |
Stimulant laxative abuse |
Neoplasia |
Colon carcinoma |
Lymphoma |
Villous adenoma |
Vasculitis |
Inflammatory diarrhea |
Diverticulitis |
Infectious diseases |
Invasive bacterial infections (eg, tuberculosis, yersinosis) |
Invasive parasitic infections (eg, amebiasis, strongyloidiasis) |
Pseudomembranous colitis |
Ulcerating viral infections (eg, cytomegalovirus, herpes simplex virus) |
IBD (most cases) |
Crohn disease |
Ulcerative colitis |
Ulcerative jejunoileitis |
Microscopic colitis (some cases) |
Ischemic colitis |
Neoplasia |
Colon cancer |
Lymphoma |
Radiation colitis |
Fatty diarrhea |
Malabsorption syndromes |
Mesenteric ischemia |
Mucosal diseases (eg, Crohn disease, Whipple's disease) |
SBS |
SIBO |
Maldigestion |
Inadequate luminal bile acid concentration |
Pancreatic exocrine insufficiency |
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