Table 2.

Pathological diagnoses of the 592 adnexal masses

Pathology	No. (%)
Benign masses	447 (75.5)
Mature teratoma	203 (34.3)
Ovarian endometrial cyst	73 (12.3)
Serous cystadenoma and mucinous cystadenoma	63 (10.6)
Ovarian cyst and embryonic residual cyst	43 (7.3)
Adnexal inflammatory mass	42 (7.1)
Other benign tumors	17 (2.9)
Benign mixture ovarian tumor	6 (1.0)
Malignant masses	145 (24.5)
Serous cystadenocarcinoma and mucinous cystadenocarcinoma	80 (13.5)
Other malignant tumors	23 (4.0)
Borderline cystadenoma	21 (3.5)
Endometrioid adenocarcinoma	6 (1.0)
Yolk sac tumor	6 (1.0)
Immature teratoma and Malignant transformation of mature cystic teratoma	5 (0.8)
Dysgerminoma	2 (0.3)
Malignant mixed germ cell tumor	1 (0.2)
Borderline Brenner tumor	1 (0.2)