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Anal Fistula

An anal fistula is an abnormal tunnel that forms between the inside of the anus and the skin surrounding it. It often results from an infection that did not heal properly, leading to a persistent drainage of pus. Surgery is usually required to treat an anal fistula and prevent recurrent infections.

fistula-diagram.png

Image Credit: McortNGHH, CC BY-SA 4.0 , via Wikimedia Commons

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