What are my odds of colon cancer at age 22 i have no family history but i do occassionally see bright blood on stool?

Very, very low: More than 90% of colon cancers are diagnosed in patients above 50 years old. People less than 30 yrs of age in the us have about 0.06% chance of developing colon cancer over 10 years and < 1% chance over next 30 years of their lives. The incidence in younger (< 50) persons has actually increased slightly over the last decade. Blood in the stool could be due to benign causes - if in doubt, see md.

Very rare at 22!: My youngest pt with colon ca is 21, so not unheard of, but quite rare still. Family history is the biggest risk factor, so if it is not in your family, you can relax. Unless of course, you have worrisome symptoms like unexplained bleeding, change in bm's. See your doctor to discuss your worries and i'm sure they can steer you in the right direction, and evaluate you genetically if indicated too.