The Longterm Risk of Advanced Colorectal Neoplasia After Colonoscopy - A Population-based Cohort Study in Hong Kong

This is a large population study in Hong Kong looking at the long-term risk of developing advanced colorectal growths (polyps or cancer) in people who have had a colonoscopy. Researchers are reviewing medical records to understand how colonoscopy findings predict future risk of colorectal cancer. **You may be eligible if...** - You had a colonoscopy performed at a Hong Kong hospital during the study period - You are willing to have your medical records reviewed as part of the study **You may NOT be eligible if...** - You had a documented history of colorectal cancer before the study period began Talk to your doctor to see if this trial is right for you.