Risk of Colorectal Cancer and Advanced Polyps One Year After Excision of High-Risk Adenomas.

Background: Patients with multiple or large adenomas are considered to be high-risk for metachronous colorectal cancer.

Objective: Evaluate the risks of detecting colorectal cancer, advanced adenoma, and advanced serrated polyps at 1-year surveillance colonoscopy in patients with >5 adenomas or adenomas >20 mm.

Design: Descriptive, retrospective, multicentric, cohort study.