text: An enterovaginal fistula is a hole in the wall between your rectum and your vagina, so that feces can enter your vagina. Cancer in the pelvic region and long difficult labour can cause this. A fistula, meaning opening between two areas that should not have it, can also occur between your urinary bladder and vagina, so you leak urine into your vagina. Or it can occur between your bladder and rectum so you can get feces into your urine. A fistula is not part of a persons normal anatomy. The word entero in enterovaginal fistula, means something to do with you gut basically. I am a Physician.