Re: how long does colon cancer take to develop
The most common symptom is no symptoms at all. Next is anemia of unknown origin. Depending on what part of the colon cancer develops in determines if and how soon symptoms will develop. That is why it is vital to start having colonoscopy screenings at age 50 for those with no family history of colon or endometrial cancer and for people who have relatives that have had colon cancer, screening should start at least 10 years prior to the age of onset of the relative, since it normally takes up to 10 years for a polyp to go through various changes culminating in cancer. However, if there is a strong history of colon or related cancers in the family, the person with the colon cancer should go for genetic testing and if positive (HNPCC or FAP) that person's direct relatives need to start screening colonosocpies in young adulthood and have them every year or two since hereditary colon cancer can develop from a polyp in as little as 18 months to 2 years. Hereditary colon cancer tends to strike at a much younger age affecting some people in their 50s, 40, 30s and even 20s. On the positive side, hereditary colon cancers usually have a better prognosis than random ones if caught early.