Hello,
I see you are asking "Is Familial polyposis cancerous"
Familial adenomatous polyposis (FAP) is an inherited disorder characterized by cancer of the large intestine (colon ) and rectum. People with the classic type of familial adenomatous polyposis may begin to develop multiple noncancerous (benign) growths (polyps ) in the colon as early as their teenage years.
To get more info visit the url: orthopedicshealth. com/symptoms/directory/a