60 yrs, or two second degree relatives with
colon cancer, screening as for average risk population (see 5
methods above) but beginning at age 40.
2. For people with two or more first degree relatives with colon cancer (any age) or one first degree relative age < 60 with colon cancer, then begin colonoscopy every 5 years starting at age 40, or 10 years younger than the earliest diagnosis in the family, whichever comes first.