Miscellaneous colitides

Purpose of review: A variety of diseases cause symptomatic inflammation of the colon. The epidemiology, clinical features, and/or endoscopic appearance of these conditions are distinct and histologic findings are often definitive. Recent findings: Recent literature adds to our understanding of the epidemiology and treatment of these disorders. Summary: Microscopic colitis, ischemic colitis, eosinophilic colitis, and drug-induced colitis, all cause diarrhea, often with abdominal pain, due to inflammation of the colon. Careful consideration of the clinical features and colonic mucosal biopsies usually lead to the correct diagnosis and appropriate therapy.