MRI Defecography. MRI defecography uses magnetic fields instead of X-rays to create detailed images of the rectum and pelvic floor, especially soft tissues that X-ray defecography may not clearly ...

Its functions include storing food remains before they pass through the rest of the colon and rectum for elimination. The large intestine plays a role in the absorption of nutrients.

Cancer, foreign bodies in the rectum, radiation therapy, and inflammatory bowel disease may also increase the risk. No medication or lifestyle changes can cure a fistula. Surgery is usually necessary.