surgical procedure in which the rectum is joined to the ileum after removal of the colon

a surgical operation for ulcerative colitis where, after total colectomy, an internal pouch is made from the ileum and attached to the anus, thus preserving continence and allowing evacuation in the normal manner. (This operation is also known as the 'pouch' or Parks operation) .

an operation to remove the colon and inner lining of the rectum, but leave the outer muscle of the rectum. The bottom end of the small intestine (ileum) is pulled through the remaining rectum and joined to the anus, allowing stool to pass normally.