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Familial adenomatous polyposis (FAP)

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Familial adenomatous polyposis (FAP) is an inherited condition in which numerous polyps (growths that protrude from mucous membranes) form on the inside walls of the colon and rectum. Having FAP makes it very likely that a person will get colorectal cancer.

People with FAP can develop polyps in their 20s and 30s or even earlier. They may have hundreds of polyps throughout the colon by their 30s. Surgery to remove the colon (colectomy) is usually the recommended treatment.

The gene mutation that causes FAP can be detected by a genetic screening test. If the test result is positive, immediate family members should also be screened. Yearly screening may need to begin as early as age 10.

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC Staff

Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC Staff

Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.