Comparison of Gi-Rads Ultrasonographic Stratification and IOTA Simple Rules in Distinguishing Benign Ovarian Masses from Malignant Ones

ABSTRACT

Background: Ovarian masses are common gynecological diseases which may appear and develop in any age group. Despite low prevalence rates, ovarian cancers still have a poor prognosis with high mortality rates, which can be effectively treated in the case of early detection and diagnosis. Methods: A total of 368 cases with ovarian masses treated from January 2016 to December 2017 were selected. These patients were diagnosed again by junior and senior blinded physicians using International Ovarian of Tumor Analysis simple rules (IOTA-SRs) and Gynecologic Imaging Reporting and Data System (Gi-Rads) respectively. Then the diagnostic efficiencies of 2 combined methods and individual ones were compared. Results: For the diagnosis of 368 patients, there were no significant differences between the sensitivity, PPV, NPV and DAR using IOTA-SRs and Gi-Rads by junior and senior physicians (p>0.05). Combining the 2 methods, it boosted the diagnostic performance, with the sensitivity, specificity, and DAR increasing to 96.3%, 92.31%, and 93.48% respectively. The sensitivity and NPV were significantly different (p=0.021, 0.032, p<0.05). Conclusion: Both IOTA-SRs and Gi-Rads had higher diagnostic performance and lower dependence on clinical experience. Combining the 2 methods may enhance the diagnostic performance, especially the sensitivity and NPV. Therefore, it is worthwhile to combine IOTA-SRs with Gi-Rads in the standardization and implementation of public reporting mechanism and the promotion of accurate pre-procedural stratification.