Colonoscopy has long been the standard in screening for colorectal cancer in people age 50 or older. It has proven very effective in finding polyps (growths) and lesions in the colon that can be removed before they become cancer. According to the Colon Cancer Alliance, 80 percent of all colorectal cancer can be prevented with screening. Southern NH Medical Center is the first hospital in southern New Hampshire to use high-definition (HD) endoscopes, improving the image quality from these procedures and providing physicians with better diagnostic tools.