FIGO stage | Number of cases | High grade serous (% by stage), n (%) | Histological subtype | n (%) |
1 | 78 | 12 (15.4) | Epithelial | |
Mucinous | 25 (32.1) | |||
Endometrioid | 16 (20.5) | |||
High grade serous | 12 (15.4) | |||
Clear cell | 12 (15.4) | |||
Low grade serous | 6 (7.7) | |||
Unknown | 1 (1.3) | |||
Non-epithelial | ||||
Germ cell tumor | 1 (1.3) | |||
Sex cord stromal tumor | 5 (6.3) | |||
2 | 25 | 18 | Epithelial | |
High grade serous | 18 (72.0) | |||
Mucinous | 2 (8.0) | |||
Endometrioid | 1 (4.0) | |||
Low grade serous | 2 (8.0) | |||
Undifferentiated | 1 (4.0) | |||
Non-epithelial | ||||
Sex cord stromal tumor | 1 (4.2) | |||
3 | 94 | 75 | Epithelial | |
High grade serous | 75 (79.8) | |||
Low grade serous | 7 (7.4) | |||
Endometrioid | 5 5.3) | |||
Clear cell | 5 (5.3) | |||
Unknown | 1 (1.1) | |||
Non-epithelial | ||||
Germ cell tumor | 1 (1.1) | |||
4 | 13 | 11 | Epithelial | |
High grade serous | 11 (84.6) | |||
Low grade serous | 1 (7.7) | |||
Non-epithelial | ||||
Germ cell tumor | 1 (7.7) | |||
NA | 5 | 3 (100) | Epithelial | |
High grade serous | 3 (60.0) | |||
Unknown | 2 (40.0) | |||
Total | 215 | 114 (55.1) | Epithelial | |
High grade serous | 119 (55.3) | |||
Mucinous | 27 (12.6) | |||
Endometrioid | 22 (10.2) | |||
Clear cell | 17 (7.9) | |||
Low grade serous | 16 (7.4) | |||
Unknown | 4 (1.8) | |||
Undifferentiated | 1 (0.5) | |||
Non-epithelial | ||||
Sex cord stromal tumor | 6 (2.8) | |||
Germ cell tumor | 3 (1.5) |
FIGO, International Federation of Gynecology and Obstetrics; NA, not available.