how long does it take a colon polyp to become cancerous?
Generally it does take several years for a polyp to become cancer, but there are always exceptions to the rule. As well, if the person having the colonoscopy did not follow directions completely and was therefore not fully cleaned out, stool in the colon could mask cancerous or pre-cancerous changes present.
how long b/4 a polyp becomes cancer. A family member had a colonoscopy last year in which they removed a benign polyp. This year he has been diagnosed with colon cancer. I heard somewhere it took 5 - 10 yrs for a polyp to become a cancer.