Prevalence of advanced histologic features in diminutive colon polyps

Background/Aims: Accurate in vivo differentiation of colon polyp histology may serve to prevent the resection of diminutive hyperplastic polyps in the distal colon or the need for histologic assesment of diminutive polyps after resection. The clinical implementation of these strategies depends on the prevalence of advanced histologic findings among diminutive polyps. We aimed to determine the prevalence of advanced histologic features (villous features, high-grade dysplasia, and adenocarcinoma) in diminutive colon polyps and compare it to small and larger polyps. Patients/Methods : The data of patients who had undergone elective colonoscopy at a tertiary-care referral center were retro- spectively reviewed. The size, morphology, and location of all polyps were recorded. Polyps were divided into 3 groups according to their size : diminutive (= 5 mm), small (6-9 mm), and large (= 10 mm).