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microscopic colitis
Microscopic colitis refers to two related medical conditions which cause diarrhea: collagenous colitis and lymphocytic colitis.〔 〕 Both conditions are characterized by the presence of chronic watery diarrhea, normal appearances on colonoscopy and characteristic histopathology findings of inflammatory cells.
== Clinical features ==
People who develop microscopic colitis are characteristically, though not exclusively, middle-aged females. The average age of diagnosis is 65 but 25% of cases are diagnosed below the age of 45.〔 Patients have a long history of watery diarrhoea, which may be profuse. Microscopic colitis is the diagnosis in around 10% of cases investigated for chronic non-bloody diarrhea.〔
Colonoscopic appearances are normal or near normal. Multiple colonic biopsies are taken in order to make the diagnosis. As the changes are often patchy, an examination limited to the rectum may miss cases of microscopic colitis, and so a full colonoscopy has been recommended.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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