ESTUDO DA ACURÁCIA NA AVALIAÇÃO DOS PÓLIPOS ENTRE A COLONOSCOPIA CONVENCIONAL, CROMOSCOPIA COM NARROW-BAND IMAGING E CROMOSCOPIA COM ÍNDIGO CARMIN

Introduction: Chromoendoscopy techniques improved the accuracy in identifying colorectal polyps and contributed to the standardization of classifications. The Kudo classification assesses intestinal crypts through dyes, while Japan NBI Expert Team mainly evaluates the vascular pattern of the intestinal mucosa by electronic chromoendoscopy. Both aid in diagnostic accuracy and colorectal cancer screening. Objective: To compare the efficacy of conventional colonoscopy, indigo chromoendoscopy and Narrow-Band Imaging colonoscopy in the diagnostic accuracy of neoplastic and non-neoplastic colorectal polyps. Materials and methods: 119 polypectomies were performed on small colorectal polyps in a specialized center. Polyp images were evaluated by an experienced endoscopist, who evaluated the vascular patterns and surfaces of the polyps according to the Kudo and Japan NBI Expert Team classifications, according to the method used (dye, Narrow-Band Imaging or conventional colonoscopy deduction). ). The results of the classifications were compared with the histological examination. Conclusion: Indigo colonoscopy, NBI colonoscopy and conventional colonoscopy have efficacy in endoscopic diagnosis, with indigo chromoscopy being the most accurate. However, the endoscopic diagnosis should not be exclusive, being complemented by the histological evaluation.