Diseases and Conditions
Familial adenomatous polyposis
Overview
Symptoms
Causes
Risk factors
Complications
Prevention
Diagnosis
Treatment
Coping and support
Preparing for an appointment
Symptoms
The main sign of FAP is hundreds or even thousands of polyps growing in your colon and rectum, usually starting by your mid-teens. The polyps are nearly 100 percent certain to develop into colon cancer or rectal cancer by the time you're in your 40s.
