BOWEL: Bowels are part of human intestines and are responsible for the body's waste disposal system. Small + Large Bowel Surgery for Cancer of Bowel: Bowel cancer is treated either through hemicolectomy in which surgery is done to remove part of the colon or is done through abdominoperineal resection in which the anus, rectum, and sigmoid colon are removed. SMALL BOWEL CANCER-RESECTION AND ANASTOMOSIS: Small bowel resection is surgery to remove part or all of your small bowel.