attenuated familial adenomatous polyposis attenuated familial adenomatous polyposis attenuated familial adenomatous polyposis is a form of familial adenomatous polyposis, a cancer syndrome. it is a pre-malignant disease that can develop into colorectal cancer. a patient will have fewer than a hundred polyps located typically in right side of the colon. cancer might develop as early as the age of five, though typically presents later than classical fap. attenuated familial adenomatous polyposisother namesattenuated familial polyposis colispecialtyoncology