Fecal diversion in complex anal fistulas: Is there a way to avoid it?

Abstract

Temporary fecal diversion by a diverting colostomy or ileostomy is occasionally performed for serious complex fistulas. The main indications are highly complex and extensive cryptoglandular anal fistula, anal fistula associated with severe anorectal Crohn's disease, recurrent rectovaginal fistula, radiation-induced fistula and anal fistula with associated necrotizing fasciitis. The purpose of stoma formation is to divert the fecal stream away from the anorectum and the perianal region so as to control the infective process and prevent trauma to the operated repaired tissues. Once the fistula has healed, the diverting stoma is closed. However, two questions are relevant. First, is it certain that the same disease would not relapse (or the fistula would not recur) once the colostomy is closed? Second, is there a non-surgical method which can obviate the need for a diverting colostomy? An attempt is made to answer both these questions in this review.