Around 1 in 5 people diagnosed with Crohn’s disease will need surgery within 10 years, and the specific operation depends on where the disease is located and what complications it has caused. The most common procedures are bowel resection (removing a damaged section of intestine), stricturoplasty (widening a narrowed segment without removing it), colectomy or proctocolectomy (removing part or all of the colon and rectum), and surgeries to manage fistulas and abscesses around the anus.
Surgery doesn’t cure Crohn’s disease, but it can relieve symptoms that medications can no longer control, fix structural damage like blockages or holes in the intestinal wall, and restore quality of life for years.
Bowel Resection
Bowel resection is the most frequently performed surgery for Crohn’s. It removes the diseased portion of intestine and reconnects the healthy ends. Because Crohn’s most often targets the last section of the small intestine where it meets the large intestine, the classic version of this operation is called an ileocecal resection. Surgeons only remove the visibly damaged tissue plus about 2 centimeters of healthy-looking bowel on each side. There’s no benefit to cutting wider margins, and keeping as much intestine as possible is a priority since your small bowel handles nutrient absorption across its 20 to 30 feet of length.
After the diseased segment is removed, the surgeon reconnects the two open ends using stitches or staples. This reconnection is called an anastomosis. If the remaining tissue is too inflamed or there isn’t enough healthy bowel to join safely, the surgeon instead creates an ileostomy, routing the end of the small intestine through an opening in the abdomen so waste empties into an external pouch. An ileostomy can be temporary or permanent depending on the situation.
Most resections are now performed laparoscopically (through several small incisions rather than one large one). Randomized trials have shown that the laparoscopic approach leads to fewer complications, shorter hospital stays, better lung function after surgery, and lower costs compared to open surgery. Median hospital stays for laparoscopic colorectal resections run about 5 to 7 days, compared to 11 or more days for open procedures. Laparoscopic surgery also lowers the risk of future bowel obstructions from internal scarring, which matters because many Crohn’s patients eventually need more than one operation.
Stricturoplasty
Stricturoplasty widens a narrowed section of intestine without removing any bowel. Repeated cycles of inflammation cause scar tissue to build up inside the intestinal wall, gradually tightening the passageway until food and stool have trouble getting through. When these narrowings (strictures) don’t respond to medication or balloon dilation during a colonoscopy, stricturoplasty can reopen them.
The technique varies depending on how long the narrowed segment is. For short strictures under about 10 centimeters, surgeons make a lengthwise cut across the narrowing and then stitch it closed in the opposite direction, turning a tight tube into a wider one. For longer strictures up to 20 centimeters, the bowel is folded into a U shape, opened along its length, and sewn together side to side, creating a wider channel.
Stricturoplasty is the preferred choice when a patient has multiple strictures scattered along a long stretch of small bowel, or when previous resections have already shortened the intestine enough that removing more tissue could lead to short bowel syndrome, a serious condition where too little intestine remains to absorb adequate nutrition. It’s generally avoided when there’s an active abscess, a mass of inflamed tissue, or any suspicion of cancer at the stricture site.
Colectomy and Proctocolectomy
Over 60% of people with Crohn’s have some degree of colon involvement. When Crohn’s damages large portions of the colon, more extensive surgery is needed. The options range from removing a short segment to taking out the entire colon and rectum, depending on how much of the large intestine is affected and whether the rectum and anus are involved.
If only a limited area of the colon is diseased, surgeons can perform a segmental resection, removing just that section and reconnecting the remaining colon. When most of the colon is affected but the rectum is relatively spared, removing the colon and connecting the small intestine directly to the rectum (an ileorectal anastomosis) avoids a permanent ostomy.
For patients with widespread colonic disease combined with severe rectal inflammation or perianal fistulas, a complete proctocolectomy, removing the entire colon and rectum, is often the safest option. This results in a permanent ileostomy. It’s typically considered the last resort for patients whose disease has not responded to any medical therapy, but it effectively eliminates the source of colonic symptoms. In emergency situations like uncontrolled bleeding or a perforated bowel, surgeons usually perform a subtotal colectomy, leaving a rectal stump and creating a temporary ileostomy, with plans to address the rectum in a later operation once the patient has stabilized.
Surgery for Perianal Fistulas and Abscesses
Crohn’s frequently causes problems around the anus, including abscesses (pockets of infection) and fistulas (abnormal tunnels between the intestine and the skin or other organs). Perianal abscesses occur in roughly 23% to 62% of Crohn’s patients and often have a fistula hiding underneath.
The first step is draining any abscess. Early drainage combined with antibiotics resolves symptoms in most cases, though recurrence rates are high and additional procedures are common. To keep a fistula draining and prevent new abscesses from forming, surgeons often place a seton, a thin loop of material threaded through the fistula tract. The seton stays in place for weeks or months and can be combined with biologic medications. Studies show that 60% to 80% of patients treated with setons alongside biologic therapy experience meaningful improvement, though complete fistula closure happens in only about 40% to 50%.
For simple, shallow fistulas that don’t involve much of the anal sphincter muscle, a fistulotomy (cutting the tract open and letting it heal from the inside out) has success rates of 75% to 95% in the general population. In Crohn’s patients, however, impaired wound healing pushes recurrence rates up to around 45%, so this approach is reserved for carefully selected cases.
What Happens After Surgery
Because Crohn’s is a chronic inflammatory condition, surgery addresses damage that has already occurred but does not stop the underlying disease process. After an ileocolic resection, endoscopic signs of disease recurrence at the surgical site appear in roughly 37% of patients within six months. The technique used to rejoin the bowel matters: a newer method called the Kono-S anastomosis shows recurrence in about 25% of patients, compared to around 43% with conventional techniques.
To reduce the chance of recurrence, most patients are started on preventive medication after surgery. Regular follow-up colonoscopies, typically within the first year after a resection, allow doctors to catch early signs of returning inflammation before symptoms develop. Smoking significantly increases recurrence risk, so quitting is one of the most impactful things you can do after surgery.
Despite the possibility of recurrence, surgery often delivers years of symptom relief. Many people describe the period after a successful resection as the best they’ve felt since their diagnosis. The goal of every Crohn’s surgery is to remove or repair as little tissue as necessary, preserve bowel length, and give you the longest stretch of good health possible before further intervention might be needed.