Pouchy.orgFAP & the Pouch
Special considerations when J-pouch surgery is done for FAP.
FAP in Brief
Familial adenomatous polyposis (FAP) is a genetic condition that causes hundreds of polyps to form in the colon. Without treatment, the lifetime risk of colon cancer is very high. Removing the colon — often with creation of a J-pouch — is a key part of management for many patients.
How FAP Pouch Surgery Differs from UC Pouch Surgery
- Surgery is often done before any cancer develops — the goal is prevention
- Bowel function before surgery is usually normal, which can make the recovery period feel like a bigger change
- Patients are usually younger, which affects long-term considerations like fertility and decades of follow-up
- Surveillance after surgery focuses on screening the pouch, the small bowel, and other parts of the body where polyps can develop (such as the duodenum)
- An ileorectal anastomosis (IRA) — where the rectum is left in place — is sometimes an alternative to a pouch in carefully selected patients
Long-Term Surveillance
After FAP pouch surgery, periodic pouchoscopy and upper endoscopy (looking at the duodenum) are typically recommended for life. Polyps can develop in the pouch over time, although serious problems are uncommon if surveillance is consistent. A team that includes a colorectal surgeon, gastroenterologist, and genetic counselor familiar with FAP is ideal.
Family Implications
FAP is inherited in an autosomal dominant pattern — meaning each child of an affected parent has a 50% chance of inheriting the gene. Genetic counseling helps families understand testing options, screening for at-risk family members, and reproductive choices.
Last reviewed: June 27, 2026 · Pouchy.org patient education, medically reviewed by Stefan D. Holubar, MD, MS (Cleveland Clinic).