source: The Children’s Hospital of Philadelphia
Familial adenomatous polyposis (FAP) is a rare hereditary cancer syndrome associated with the development of colon cancer at an earlier than expected age. Familial adenomatous polyposis is characterized by the presence of gastrointestinal polyps, (abnormal tissue growths that develop from the lining of the large and small intestines, and less commonly, the stomach). Some of these polyps can become cancerous. Because familial adenomatous polyposis is hereditary, the risk of developing the features associated with FAP can be passed from generation to generation in a family.