Validación de las reglas simples de la iota para el diagnóstico de malignidad de tumores ováricos. Hospitales Vicente Corral Moscoso y José Carrasco Arteaga. Cuenca, 2020

Abstract

Background: Ovarian tumors are a frequent finding in reproductive age. Ultrasound has a sensitivity of 88-100% and a specificity of 62-96% to detect and characterize them, using simple rules (IOTA). Objective: To determine the validity of the simple IOTA rules for the diagnosis of malignancy of ovarian tumors compared with the histopathological, in patients attending the Vicente Corral Moscoso and José Carrasco Arteaga Hospitals, in the city of Cuenca, in 2020. Methodology: Validation of diagnostic tests that compared the simple rules (IOTA) by means of endovaginal ultrasound for the diagnosis of malignancy of ovarian tumors in women seen in outpatient and emergency services of the Imaging service of the Vicente Corral Moscoso and José Carrasco Arteaga Hospitals, the gold test was histopathology, the data were entered and analyzed in the SPSS statistical system (version 15.0). Qualitative variables are represented as absolute and relative frequencies (percentages). Sensitivity, specificity, predictive values and likelihood indices were obtained. Results: 57 women were included with a mean age of 32,2 (±14,5) with a range 18-70 years. According to IOTA criteria, 87,7% were benign and 12,3% were malignant. When compared with the histopathological, they had a sensitivity 75% and specificity 92,40%, positive predictive value 42,85%, negative predictive value 98%, Youden´s J statistic 0,674, positive likelihood ratio 9,86, negative likelihood ratio 0,27. Conclusions: simple IOTA rules allowed to adequately discriminate benign from malignant ovarian tumors.