Familial adenomatous polyposis is a rare, inherited condition that causes extra tissue (polyps) to form in your large intestine and in the upper part of your small intestine (duodenum). If untreated, the polyps in the large intestine almost always become cancerous by age 40.
Most people with familial adenomatous polyposis eventually need surgery to remove the upper part of the large intestine (colon) to prevent cancer. The polyps in the duodenum can also develop cancer, but they can usually be managed by removing them regularly.
Mayo Clinic in Rochester, Minn., ranks No. 1 for digestive disorders in the U.S. News & World Report Best Hospitals rankings. Mayo Clinic in Scottsdale, Ariz., and Mayo Clinic in Jacksonville, Fla., are ranked high performing for digestive disorders by U.S. News & World Report.
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