The term Enterocutaneous fistula refers to a lesion of the digestive tract, through which substances in the lumen of the tube escape through the chest wall, abdominal wall... out of the body. Digestive fistula does not include lesions in which substances in the lumen of the digestive tract leak through the suture line, the anastomosis, the perforation, the tear, the necrosis of the intestinal wall... into the abdominal cavity causing peritonitis.