a fistula is an abnormal connection that develops between two body parts. fistulas most often form as part of the healing process in an area of inflammation injury or previous surgery. there are many different types of fistulas: enterocutaneous fistula (between the intestine and the skin usually developing after abdominal surgery) rectovaginal fistula (between the rectum and the vagina) tracheoesophageal fistula (between the trachea and the esophagus) umbilical fistula (between the navel and the intestine) arteriovenous fistula (between an artery and a vein). some fistulas may heal and go away on their own. fistulas that do not heal generally require surgical repair.
what is a fistula?