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Anal fistula

Summary of Anal fistula
Anal fistula is a chronic abnormal communication between the epithelialised surface of the anal canal and the perianal skin. An anal fistula can be described as a narrow tunnel with its internal opening in the anal canal and its external opening in the skin near the anus. Anal fistulae commonly occur in people with a history of anal abscesses. They can form when anal abscesses do not heal properly.

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Pathology

Gastrointestinal system

Peritoneum and peritoneal cavity disorders
Upper gastrointestinal tract disorders
Lower gastrointestinal tract disorders
Liver, gallbladder and pancreas disorders