The histologic type and stage distribution of ovarian carcinomas of surface epithelial origin.

Advances over the past decade suggest a need to reassess the distribution of ovarian surface epithelial tumors. A series of 220 consecutive invasive ovarian carcinomas, including carcinosarcomas and peritoneal carcinomas, was reviewed. Notable findings include: 7% of tumors were carcinosarcomas; 22% of cases of peritoneal serous carcinomatosis were of peritoneal origin; <3% of cases were mucinous carcinomas; and only one malignant Brenner tumor (0.5%) and no pure transitional cell carcinomas were identified. If peritoneal carcinomas, carcinosarcomas, and mixed carcinomas with a serous component are combined with serous carcinomas, this group accounts for 78% of all cases and 87% of advanced stage cases, suggesting a greater uniformity to epithelial ovarian cancer than previously appreciated.