Background: Low transsphincteric fistulas less than 1/3 of the sphincter complex are easy to treat by fistulotomy with a high success rate. High transsphincteric fistulas remain a surgical challenge.

Jennifer Jones, MD, Advanced Fellow in Inflammatory Bowel Disease, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota William Tremaine, MD, Professor of Medicine ...