Table 1.
Pathological diagnosis of bilateral ovarian tumors
| Pathological type | N | |
| Primary benign | Total 26 | |
| Mature teratoma | 20 | |
| Mature teratoma/Serous adenoma | 1 | |
| Mature teratoma/Struma ovarii | 1 | |
| Serous adenoma | 3 | |
| Fibroma | 1 | |
| Primary benign and malignant | Total 1 | |
| Serous adenoma/Mucinous borderline tumor | 1 | |
| Primary malignant | Total 42 | |
| Serous carcinoma | 36 | |
| Clear cell carcinoma | 3 | |
| Carcinosarcoma | 2 | |
| Borderline endometrioid tumor/Endometrioid carcinoma | 1 | |
| Metastasis | Total 12 | |
| Appendiceal cancer | 3 | |
| Cervical cancer | 2 | |
| Colon cancer | 2 | |
| Bile duct cancer | 1 | |
| Gastric cancer | 1 | |
| Kidney cancer | 1 | |
| Peritoneal mesothelioma | 1 | |
| Uterine malignant lymphoma | 1 | |