Resection is another name for any surgery that removes tissue or part of an organ. Bowel resection removes a diseased or damaged part of the small intestine, large intestine (colon), or rectum. Bowel resection can be done for many diseases that affect the colon, such as colorectal cancer, diverticulitis, or Crohn's disease.
The goal of bowel resection is to take out the part of the bowel where the problem is. If the doctor is removing cancer from the colon, nearby lymph nodes are taken out and tested for cancer. Then healthy ends of the colon or rectum are sewn back together. Bowel resection is done either by opening the abdomen (open resection) or by laparoscopy.
Laparoscopy for bowel resection usually involves 3 to 6 very small incisions instead of one large one. Recovery time is often faster.
You and your doctor will think about several things in deciding whether you should have open resection or a laparoscopy. These include:
- The location and extent of the disease.
- Your general health.
- Whether you have scar tissue in the area from previous surgery.
- Your doctor's expertise and experience.
Sometimes a laparoscopic surgery has to be changed to an open resection during the surgery.
What To Expect
Bowel resection requires general anesthesia. You may stay in the hospital for 4 to 7 days or as long as 2 weeks after surgery.
Sometimes the two parts of the colon or rectum can't be reattached, so the surgeon performs a colostomy. This creates an opening, called a stoma, on the outside of the body for the stool, or feces, to pass through into a colostomy bag. Usually the colostomy is temporary, until the colon or rectum heals. If the lower part of the rectum has been removed, the colostomy is permanent.
When the two-stage surgery is done, the time between surgeries is usually 6 to 12 weeks.
The recovery time after each surgery is usually 6 to 8 weeks.
Why It Is Done
Bowel resection may be done to remove cancer or when the bowel cannot function normally because of damage or disease. You may need a bowel resection if you have:
- A bowel obstruction.
- Colon cancer.
- Crohn's disease.
- Diverticulitis.
How Well It Works
Most people who have surgery for invasive cancer do not have the tumor return. The likelihood of success depends on many factors, such as the stage of the cancer.
A small number of people who have surgery for diverticulitis develop diverticulitis again within 5 years. But another surgery is usually not needed.
Surgery is not a cure for Crohn's disease. When surgery for Crohn's is needed, as little of the intestine as possible is removed to keep the intestines working normally. The disease tends to return to other areas of the intestines after surgery. About one-quarter of Crohn's disease patients who have a first surgery also have a second. And many of these second ones are within 5 years of the first surgery. In children, surgery may improve well-being and quality of life and restore normal growth and sexual development.
If a colostomy is needed during the bowel resection, usually it is temporary, until the colon or rectum heals. If the lower part of the rectum has been removed, the colostomy is permanent.
Risks
All surgeries have some risks of infection, severe bleeding, or complications from general anesthesia.
Possible problems after a bowel resection include:
- Scar tissue (adhesions).
- A leak between the joined sections of the colon.
- Injury to the bladder, ureters, or blood vessels.
Credits
Current as of: March 12, 2026
Author:
WebMD Ignite Staff
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