What is the recommended cancer screening interval for average-risk colorectal cancer with colonoscopy?

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The main idea is the screening interval after a normal colonoscopy in someone at average risk. When a colonoscopy shows no polyps and the bowel prep is adequate, the next screening is recommended about 10 years later. This long interval reflects the slow progression from small adenomas to cancer and the strong preventive value of removing any polyps if found. If polyps had been detected and removed, the follow-up interval would be shorter (often a few years, depending on the number, size, and histology of the polyps). Options like repeating every 2 years or every 5 years are not appropriate for a completely normal result in average-risk individuals, and saying no colonoscopy is needed contradicts standard screening guidance.