I had stage one colon cancer in 2001 did not have any chemo or radiation and no problems since is that likely to reappear at some point?

Not likely: You have made it 13 years without problems and that is a good sign. It nor possible to say categorically, but hopefully you are cured of the disease. See this site for more information in this subject. <a href="http://www.cancer.org/cancer/colonandrectumcancer/detailedguide/colorectal-cancer-survival-rates" rel="nofollow" target="_blank">http://www.cancer.org/cancer/colonandrectumcancer/detaile