By Mayo Clinic Staff
Anal fistula is the medical term for an infected tunnel that develops between the skin and the muscular opening at the end of the digestive tract (anus).
Most anal fistulas are the result of an infection that starts in an anal gland. This infection results in an abscess that drains spontaneously or is drained surgically through the skin next to the anus. The fistula then forms a tunnel under the skin and connects with the infected gland.
Surgery is usually needed to treat anal fistula.
May 06, 2015
- Abscess and fistula expanded information. American Society of Colon and Rectal Surgeons. https://www.fascrs.org/patients/disease-condition/abscess-and-fistula-expanded-information. Accessed April 19, 2015.
- Anorectal fistula (fistula in ano). The Merck Manual Professional Edition. http://www.merckmanuals.com/professional/gastrointestinal-disorders/anorectal-disorders/anorectal-fistula. Accessed April 20, 2015.
- Cook AJ. Decision Support System. Mayo Clinic, Rochester, Minn. April 16, 2015.
- Schwartz DA, et al. The role of imaging tests in the evaluation of anal abscesses and fistulas. http://www.uptodate.com/home. Accessed April 20, 2015.
- Breen E, et al. Anorectal fistula: Clinical manifestations, diagnosis, and management principles. http://www.uptodate.com/home. Accessed April 20, 2015.
- Wolff BG (expert opinion). Mayo Clinic, Rochester, Minn. April 23, 2015.
- Pigot F. Treatment of anal fistula and abscess. Journal of Visceral Surgery. In press. Accessed April 23, 2015.