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What is the cause of fistula anus?

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Answer:

A fistula is an abnormal connection or passageway between two epithelium-lined organs or vessels that normally do not connect. It is generally a disease condition,but a fistula may be surgically created for therapeutic reasons.
Various causes of fistula are:

Disease: Inflammatory bowel disease,such as crohn's disease and ulcerative colitis.
Medical treatment: Complications from gallbladder surgery can lead to biliary fistula
Trauma: Head trauma can lead to perilymph fistula

First answer by Ambrishmscology. Last edit by Ambrishmscology. Contributor trust: 40 [recommend contributor ]. Question popularity: 1 [recommend question].

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