Polyps are removed during colonoscopy through a simple and painless procedure called a polypectomy. This is accomplished using various tools to fully remove or eradicate the polyp either by cutting it off or by heating it. Once the polyp is removed or destroyed, the chance that the polyp can become cancerous is gone. Colonoscopy with polypectomy is one of the best ways to prevent colon cancer.
American Cancer Society. "Detailed Guide: Colon and Rectum Cancer: What Are the Risk Factors for Colorectal Cancer?" American Cancer Society, Inc 17 Jan 2013. 18 Feb 2013.