What Is an Anal Fistula? An anal fistula is an abnormal tunnel that forms between the inside of the anus (the hole at the end of your digestive tract through which solid waste leaves the body ...

High transsphincteric fistulas remain a surgical ... is considered the gold standard for the treatment of high perianal fistula of cryptoglandular origin by most colorectal surgeons.

Unfortunately, there are no validated clinical measures of fistulous disease activity. The most comprehensive measure of morbidity caused by perianal Crohn's disease is provided by The Perianal ...