What are familial adenomatous polyposis (FAP) and MYH gene mutation?
There are other rare forms of hereditary colon cancer. One of these is called familial adenomatous polyposis. In this condition, children develop hundreds or thousands of polyps in the colon at a very early age. These children will almost always go on to develop colon cancer by age 40. There are two other, milder hereditary colorectal syndromes, known as attenuated familial adenomatous polyposis (AFAP) and MYH-associated polyposis. Less is known about these two recently discovered syndromes. For more information about these hereditary colon cancer syndromes, see About Familial Adenomatous Polyposis.