Familial adenomatous polyposis
Other Names for this Disease
- Adenomatous polyposis coli
- Familial adenomatous polyposis of the colon
- Familial polyposis of the colon
- Polyposis, adenomatous intestinal
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.
 Other signs and symptoms may include dental abnormalities; desmoid tumors; and benign and malignant tumors of the duodenum (a section of the small intestine), stomach, bones, skin, and other tissues. Some people have a milder form of the condition called attenuated familial adenomatous polyposis (AFAP) which is generally characterized by fewer colon polyps (an average of 30) and a delay in the development of colon cancer by 10-15 years. FAP is caused by changes (mutations) in the APC gene and is inherited in an autosomal dominant manner. People with FAP usually undergo regular screening until they develop 20 to 30 polyps and then a colectomy (removal of colon) is generally recommended.Familial adenomatous polyposis (FAP) is an inherited condition that causes cancer of the large intestine (colon) and rectum. People with the classic type of FAP usually develop hundreds to thousands of noncancerous (benign) polyps (growths) in the colon as early as their teenage years. Overtime, these polyps can become malignant (cancerous), leading to early-onset colorectal cancer at an average age of 39 years.
Last updated: 11/26/2014
- Familial Adenomatous Polyposis. Genetic Home Reference. October 2013; http://www.ghr.nlm.nih.gov/condition/familial-adenomatous-polyposis.
- Kory W Jasperson, MS and Randall W Burt, MD. APC-Associated Polyposis Conditions. GeneReviews. March 27, 2014; http://www.ncbi.nlm.nih.gov/books/NBK1345/. Accessed 4/6/2015.
- Genetics Home Reference (GHR) contains information on Familial adenomatous polyposis. This website is maintained by the National Library of Medicine.
- The Merck Manual provides information on this condition for patients and caregivers.
- The National Cancer Institute provides the most current information on cancer for patients, health professionals, and the general public.
- The National Organization for Rare Disorders (NORD) has a report for patients and families about this condition. NORD is a patient advocacy organization for individuals with rare diseases and the organizations that serve them.
- Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
- The Merck Manual for health care professionals provides information on Familial adenomatous polyposis.
- The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
- Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.
- Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
- PubMed is a searchable database of medical literature and lists journal articles that discuss Familial adenomatous polyposis. Click on the link to view a sample search on this topic.