Colonoscopy: Over the age of 40 xolonoscopy every 5 yers is a good idea becuase colon cancer can be detected early and cured. Idead is to pick up polypoid lesion that has not invaded into muscularis. Other than for that the diagnosis in an asymptomatic patient is diffieucult. A new test is being developed to measure shed antigen into the stool. This occurs in the earliest lesion where no markers in blood.
Answered 6/10/2014
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