How likely is it that someone 22 years old with no immediate family history of colon cancer gets it?
Over what time span? About 5% of men in the US will get colon cancer at some point in their life, but the vast majority of cases occur after age 50. Colon cancer is extremely rare, almost unheard of in a 22 yo, but the odds increase the older we get. However, there are many ways to prevent colon cancer such as avoiding red meat, eating more fruit & vegies, vit. D, not smoking & exercise. See http://tinyurl.com/ozhk7zu.
Unlikely. This would be very unlikely. Might be seen in certain syndromes such as familial adenomatous polyposis (fap) syndrome. Colon cancer typically presents at a later stage in life. The median age of diagnosis of colorectal cancer is around 69 yrs. Approx. 0.1% were diagnosed under age 20. Pretty unlikely. Certainly symptoms may warrant investigation, but again, likelihood is low. Read more...