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Anal fistulaAn opening in the skin near the anus that leads into a blind pouch or may connect through a tunnel with the rectal canal.
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Anal fistulaan abnormal tube-like passage connecting the anus to the surface of the surrounding skin
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Anal fistulaA fistula opening at or near the anus; usually, but not always, opening into the rectum above the internal sphincter. (05 Mar 2000)
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