Colectomy and Rectal Excision
There are a number of different reasons why a segment of bowel may require resection. Indications include benign polyps, carcinoma, hereditary non-polyposis colorectal cancer (HNPCC), familial adenomatous polyposis (FAP), diverticular disease, inflammatory bowel disease, ischaemia, trauma, and Hirschsprung’s disease. The segment of bowel that is affected dictates the operation performed.
Abdominoperineal Excision of the Rectum
The pathology (commonly rectal carcinoma) is situated in the distal one-third of the rectum. The procedure involves two incisions: one midline laparotomy wound and one in the perineum. The anus, rectum, and part of the sigmoid colon are resected and an end-colostomy may be fashioned.