Why You Need a Colonoscopy

One of my pet peeves as a Physician is when people talk about screening tests "Preventing Cancer".  Mammograms, pap tests, prostate tests (PSA), X-rays, blood tests, ultrasounds do not prevent cancer.  The best they can do is detect an abnormality early and allow for treatment.  None of those tests prevent a malignancy.  There is one screening test, however, that CAN prevent cancer and that is a