Cancer patients get annual surveillance by colonoscopy until free of neoplasia, then 3 - 5 yearly. First degree relatives of patients with bowel cancer are offered 1 screening colonoscopy or 3 FOB's 6 monthly. If the gene is present, patients get annual colonoscopy. Only good evidence is for patients with colon cancer rather than rectal cancer. In node positive colon cancer, there is a clear survival advantage with 6 months of a 5-FU based chemotherapy regimen.
Exercise is possibly protective.