Is colonoscopy the most effective way of screening for colon cancer?

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My name is Doctor Joal Sach, and I am a practicing gastroenterologist in Tarzana, California. Oftentimes I get asked a question by my patients whether a colonoscopy is the most effective way of screening for colon cancer. My answer to them is that there are several different ways for screening for colon cancer, but colonoscopy appears to be the most effective way of finding precancerous lesions and allowing us to remove them before the cancer forms. So the answer is that colonoscopy is the best way to prevent colon cancer.