Anal fistula is a pathological communication between the anal canal and the skin, developed after inflammation or infection of the area, usually following a para-anal abscess. Other conditions, such ascan also cause anal fistulas.
Para-anal abscess is the first symptom of anal fistula
A usual manifestation of anal fistula is anal abscess due to the accumulation of pus, or by the discharge of pus at the level of the anal area caused by the drainage of an abscess through a fistula. Anal fistulas are classified according to their location relative to the anal sphincters.
The diagnosis is essentially based on a clinical examination and, but may require, in complex cases, an endo -anal ultrasound , a CT scan or even an MRI.
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Surgical treatment of anal fistula
The treatment of anal abscess in the acute phase includes surgical drainage under local or general anesthesia and the placement of a drainage thread in the fistula path (named Seton drain). Depending on the type of fistula, treatment consists in the surgical removal of the fistula path with or without a mucous flap. Other more specific techniques can be used.
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