Nonadvanced Adenoma Number and Size as Predictors of Metachronous Advanced Colorectal Neoplasm: Implications for Surveillance Guidelines.

Having 5 to 10 nonadvanced adenomas significantly increases the risk of advanced colorectal neoplasm, with a 10.1% 5-year incidence, highlighting the need for tailored surveillance.

• Why it matters: Current guidelines primarily focus on lesion count without considering size, leaving a gap in risk stratification for patients with multiple NAAs, which could impact early detection and prevention strategies.
• What they did: Analyzing data from 16,870 adults over a median of 5.3 years, researchers assessed the relationship between NAA count, size, and subsequent ACN risk using Cox regression and inverse probability weighting.
• The result: Findings show that NAA count and size both influence risk, with higher counts and larger adenomas associated with increased ACN incidence, suggesting that surveillance should incorporate both factors for better risk management.