Re: What are the benefits of Genetic Testing?
The purpose of genetic testing in your case would be to see if you have one of the HNPCC mutations (Lynch Syndrome). The reason for this is HNPCC colon cancers develop much more rapidly than sporadic random colon cancer and the recommendations for HNPCC strongly suggest yearly colonoscopy. In addition HNPCC puts a person at increased risk of other gastric cancers (upper endoscopy recommendation every 4 yrs), renal pelvic/ureter cancer (yearly urine cytology recommended) for women 50-60% risk of endometrial cancer and 12% risk of ovarian cancer. In addition some brain cancers and pancreatic cancer may have an increased risk too.
The first step would be to have the tubular adenoma tissue tested for microsatellite instability. If microsatellite high, there is a good probability of a genetic mutation. First, though have a consult with a geneticist at a major cancer center who will take a complete family history and then proceed with testing if warranted.