A loop ileostomy is a surgical procedure in which a loop of the small intestine (ileum) is brought to the surface of the abdomen to create a stoma. This procedure is often performed to divert the flow of feces away from a diseased or damaged part of the colon or rectum, allowing it to heal or be surgically treated. In the context of cancer, a loop ileostomy may be necessary to manage complications or as part of a treatment plan for colorectal cancer.