Are CT and MRI useful tools to distinguish between micropapillary type and typical type of ovarian serous borderline tumors?

Purpose To investigate the computed tomography (CT) and magnetic resonance imaging (MRI) characteristics of ovarian serous borderline tumors (SBTs), and evaluate whether CT and MRI can be used to distinguish micropapillary from typical subtypes. Materials and methods We retrospectively reviewed the clinical features and CT and MR imaging findings of 47 patients with SBTs encountered at our institute from September 2013 to December 2019. 30 patients with 58 histologically proven typical SBT and 17 patients with 26 micropapillary SBT were reviewed. Preoperative CT and MR images were evaluated, by two observers in consensus for the laterality, maximum diameter (MD), morphology patterns, internal architecture, attenuation or signal intensity, ADC value, enhancement patterns of solid portions (SP), and extra-ovarian imaging features. Results The median age were similar between typical SBT and SBT-MP (32.5 years, 36 years, respectively, P >0.05). Morphology patterns between two subtypes were significantly different on CT and MR images ( P