The incidence of colorectal cancer (CRC) and cancer-related mortality has increased in patients <55 years old.1 Consensus on optimal intervals for post-CRC surveillance colonoscopy in young patients is lacking. The primary endpoint of this study was comparison of rates of metachronous advanced neoplasia (AN) in patients diagnosed with CRC at <50 and 50-75 years. The secondary aim was to evaluate risk factors of metachronous AN.
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