THE PREVALENCE OF DYSPLASIA IN COLORECTAL SERRATED/HYPERPLASTIC POLYPS IN OMANI POPULATION

Abstract

Purpose: Serrated/hyperplastic polyps (SPs) are characterised histologically by sawtooth architecture. Historically, these polyps were considered benign, without malignant potential and thus clinically unimportant. At present, the WHO defines serrated/hyperplastic lesions as heterogeneous group, which include hyperplastic polyps (HP), sessile serrated adenoma (SSA)/polyp and traditional serrated adenoma (TSA). These can have malignant potential. The aim of this study was to evaluate the prevalence of dysplastic changes in SP of colon and rectum of Omani population reported at a tertiary care centre. Methods: The study was conducted in the pathology department of a tertiary care centre including endoscopic polypectomies from colon and rectum of Omani patients presenting to gastroenterology clinic reported between 2014 and 2016, and these were analysed retrospectively for dysplastic changes and their association with different clinical parameters. Results: Dysplasia was seen in 32 of 146 cases (21.9%) and 114 (78.1%) were without dysplasia. Of these dysplastic, biopsies’ only two cases (1.4%) showed high-grade dysplasia and rest 30 (20.5%) low-grade dysplasia. According to the type of polyp, dysplasia was found in TSA 8/21 cases (46.7%) and SSA 9/17 cases (53.3%). Association of dysplasia was more common in the age group of > 50 (15.07%) and male patients (62.5%). Conclusion: SPs are now common findings that a gastroenterologist faces in their daily practice. In our study of Omani population, the prevalence of dysplasia is associated with older age group, male gender, SSA/polyp and traditional serrated adenoma. Key words: Dysplasia. colorectal, polyps