Full explanation please of why colon cancer is so rare in their 20s? but i read online of hundreds of stories people are telling about colon cancer in their 20s

Social phenomenon: As with most "news" what is talked about is the unique/unusual and tragic/dramatic stories. It doesn't surprise me that cancer in the young is blogged more than that of the usual/elderly. A generalization for most cancers can be made is that the older you are, the more vulnerable one is to a malignant transformation. Colon, breast are the most notorious. Familial risk increases with time.

It is rare: This normally is a disease of people over 50 and more typically in their 60's. Some theories about colon cancer suggest that a series of mutations must occur over time. This likely the reason that it is a rare disease in young patients. It can occur in the young as part of a genetic syndrome. Usually found in families. The typical rarely is news or of internet interest. The odd situation is.