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: November 22, 2021
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine & Kathleen Romito MD - Family Medicine & Kenneth Bark MD - General Surgery, Colon and Rectal Surgery & Caroline S. Rhoads MD - Internal Medicine