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Collagenous colitis

Other Names for this Disease
  • Microscopic colitis, collagenous type
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Collagenous colitis is a type of inflammatory bowel disease that affects the colon. It is a form of microscopic colitis, which means that the inflammation is only visible when a biopsy is examined under a microscope; the inflammation cannot be seen or diagnosed from colonoscopy or sigmoidoscopy. Signs and symptoms may be ongoing or intermittent and may include chronic, watery, non-bloody diarrhea and abdominal pain or cramps.[1] The exact underlying cause is unknown but may relate to a bacteria, a virus, an autoimmune response, and/or a genetic predisposition.[2][1] Treatment for collagenous colitis varies depending on the symptoms and severity in each individual. In some cases, the condition resolves on its own.[1]
Last updated: 6/20/2013


  1. Collagenous Colitis and Lymphocytic Colitis. National Digestive Diseases Information Clearinghouse (NDDIC). January 2006; Accessed 6/19/2013.
  2. Fernando Fernandez-Banares. Collagenous colitis. Orphanet. February 2005; Accessed 6/19/2013.
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