The objective of this study is to assess the criteria for metastatic involvement of the LN (MLN) according to magnetic resonance imaging (MRI) and to identify the most prognostically significant. The MRI data of 159 removed LN were compared with the results of a morphological study of the resected preparations. ROC- analysis (Receiver Operating Characteristic curve) was used to determine the diagnostic performance of threshold values. The test performance was evaluated depending on the area under the ROC curve — the AUC parameter (Area Under Curve). In order to evaluate the prognostic significance of MRI predictors for metastatic involvement of the LN, uni-and multivariate regression logistic analyses were performed. According to the results of multivariate analysis, the configuration index is less than or equal to 1.65, the absence of a signal from the fatty tissue of the hilum of LN, and perinodular edema are the most prognostically significant criteria for metastatic involvement of the LN (p < 0.05).

Methodology It was done a retrospective analysis of 45 cases of FTC, that are verified histologically in the period from 2013 to 2022. There were studied the preoperative sonographic data of FTC: the solid cystic or ovoid forms with areas of thickening of the walls, hardening or papillary growths on the inner surface of the capsule, incomplete septa; the presence of fluid in the uterine cavity; the blod flow of moderate or severe intensity with high speed and low resistance.Results In 9 (20%) patients with sonographical diagnosis of FTC it was confirmed intraoperatively and histologically. Another 9 (20%) cases described a sonographic picture that was characteristic for FTC, but FTC was not suspected preoperatively and was detected as a result of surgery that was performed by other indications. In the rest cases, according to ultrasound results, ovarian cancer was found in 8 (17.7%), cystadenoma or papillary cystadenoma in 7 (15.5), non-neoplastic cysts in 8 (17.7%) cases. In 4 (8.8%) cases sonographic signs of pathology were not detected. Thus, the sensitivity of ultrasound diagnosis as a method of preoperative diagnosis of FTC, provided the correct interpretation of the results in 40% (95% CI: 25.70 À 55.67%) cases. But the presence of sonographic signs of FTC was in 41 (91.1%; 95% CI: 78.78 À 97.52%) patients. Conclusion It is necessary to standardize the sonographic description of FTC for improving its diagnostics.

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