Just was diagnosed with an anorectal fistula tract and abscess. The physician I consulted in urgent care is ordering a transrectal ultrasound. Theres not much scientific literature showing that it's an effective form of imagery to effectively show a fistula...It's apparently a technical procedure that involves inserting a probe into the rectum. Could inserting a probe into - a shorten - rectum possibly cause damage to the J-Pouch? What imagery is best to show an anal fistula?