Validez de la colonoscopía con imagen en banda estrecha y magnificación óptica en el diagnóstico de pólipos de colon. Hospital José Carrasco Arteaga. Cuenca, Ecuador, 2017

Abstract

Introduction: Colorectal cancer has become a common and lethal disease over the years. Most arise from adenomas, many of which progress from small to large polyps, which acquire different degrees of cell dysplasia and develop neoplasia. Colonoscopy is the most accurate and versatile test for the diagnosis of colorectal cancer. Objective: To determine the validity of the Colonoscopy with narrow band image and Optical Magnification in the Diagnosis of Colon Polyps in patients of the José Carrasco Arteaga Hospital, Cuenca, Ecuador. 2017 Method and materials: A diagnostic test validation study was carried out that compared the characterization of polyps smaller than 20mm, by means of videocolonoscopy with narrow band image and Optical Magnification, versus histopathological result as a gold test. The sample was selected from patients coming from hospitalization and external consultation of the Gastroenterology service of the Hospital José Carrasco Arteaga who underwent colonoscopy. Results: There were 111 videocolonoscopy studies that identified 133 colonic polyps in 54 patients, with a prevalence of 48.65%, 55.56% were women, the average age was 57.5 years, the NBI plus MO obtained a sensitivity of 90.32%, specificity of 88.73%, positive predictive value of 87.50%, negative predictive value of 91.30%, Youden index was 0.79055, positive likelihood ratio of 8.016 and the ratio of negative likelihood of 0.109, Cohen's Kappa index of 0.970. Conclusions: The prevalence of colonic polyps was 48.65%, with an average age of the studied patients of 57 years, the diagnostic validity of this test is very high to be able to catalog according to the characteristics of the vascular pattern of the colonic polyps. presence or absence of malignancy in the lesions, the diagnostic safety was 79%