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Anal Fistulas Picture
An anal fistula is an abnormal connection between the
epithelialised surface of the anal canal and (usually) the perianal
skin.
Anal fistulae originate from the anal glands, which are located between
the two layers of the anal sphincters and which drain into the anal
canal. If the outlet of these glands becomes blocked, an abscess can
form which can eventually point to the skin surface. The tract formed by
this process is the fistula.
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