Differences in Imaging Findings Between Benign and Borderline Ovarian Serous/Mucous Tumors

To retrospectively analyze the differences in imaging findings between benign and borderline ovarian serous/mucous tumors.

Imaging features of benign and borderline ovarian tumors were analyzed, including the tumor maximum diameter, laterality, tumor morphology, proportion of solid components, and the number of papillary processes in cystic solid tumors.

A total of 189 tumors were evaluated, including 117 benign tumors and 72 borderline tumors. The mean maximum diameter of borderline tumors was higher than that of benign tumors (14.32 ± 9.93 vs. 8.62 ± 6.69, p < 0.05). Borderline tumors with solid components accounted for more than benign tumors (41.67% vs. 8.55%). The proportion of solid component volume/tumor volume > 15% in both benign and borderline tumors was very small (1.71%, 4.71%). In unilocular cysts and multilocular cysts, borderline tumors with diameters > 10 cm accounted for more than benign tumors. The sensitivity and specificity in distinguishing benign and borderline tumors of ultrasonography O-RADS are slightly lower than those of SR of IOTA (86.1% vs. 91.7%, 81.2% vs. 82.1%).

In conclusion, the borderline tumors are larger and have more solid components than the benign tumors. The sensitivity and specificity in distinguishing benign and borderline tumors of ultrasonography O-RADS are slightly lower than those of SR of IOTA.