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. 2022 Jan 31;41(3):511–518. doi: 10.14366/usg.21237

Fig. 1. Images exemplifying benign, borderline, and malignant masses.

Fig. 1.

A. Image of a pathologically proven ovarian endometrial cyst from a 38-year-old woman (case 129 among the 575 women) is shown. The mass was classified as O-RADS 2, a classic benign lesion with diameter <10 cm; the RMI4 score was 147.29; the malignancy risk of IOTA LR2 was 6%; and the IOTA SR model classified it as a benign lesion. B. Image of a 47-year-old woman with a pathologically proven borderline mucinous adenoma (case 7 among the 575 women) is shown. The mass was classified as O-RADS 4, a unilocular cyst with solid component; the RMI4 score was 96.18; the malignancy risk of IOTA LR2 was 20%; and the IOTA SR model categorized it as an intermediate case, which was classified as malignant by senior doctors’ subjective judgment. C. Image of a postoperative pathological adult granulosa cell tumor from a 51-year-old woman (case 84 among the 575 women) is shown. The mass was classified as O-RADS 4, a smooth solid mass with a color score of 2-3; the RMI4 score was 66.72; the malignancy risk of IOTA LR2 was 48%; and the IOTA SR model classified it as a malignant lesion. O-RADS, Ovarian-Adnexal Reporting and Data System; RMI4, Risk of Malignancy Index model 4; IOTA, International Ovarian of Tumor Analysis; IOTA LR2, IOTA Logistic Regression Model 2; IOTA SR, IOTA Simple Rules.