Colonic & Anorectal Fistulas – NIDDK

Colonic & Anorectal Fistulas – NIDDK

What are colonic and anorectal fistulas? A fistula is an abnormal passageway, or tunnel, in the body. An internal fistula is an abnormal tunnel between two internal organs. An external fistula is an abnormal tunnel between an internal organ and the outside of the body. A colonic fistula is an abnormal tunnel from the colon…

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