Cancer is shown in a section of the descending colon.

Resection is another name for any surgery that removes tissue or part of an organ. Bowel resection, also called partial colectomy, for colorectal cancer removes the tumor and part of the colon or rectum around the tumor. Both ends of the bowel section being removed are stapled and cut. Nearby lymph nodes, lymph drainage channels, and blood vessels are also removed.

The remaining ends of the bowel are reattached, either end-to-end, side-to-side, or side-to-end.

If you have laparoscopic surgery, you will have 3 to 6 small scars. An example is in the picture on the left. Your surgeon may make 1 or 2 of the small openings a little bigger to allow space to complete the surgery. If so, those scars will be a little longer than the others. If you have an open resection, you will have one long scar. An example is in the picture on the right.