Sex cord / stromal ovarian tumors are a subtype of ovarian tumors and account for 8-10% of all ovarian tumors. They arise from two groups of cells in the ovary:
- stromal cells
- primitive sex cords: celomic epithelium
The group of tumors includes
- ovarian fibroma-thecoma spectrum
- ovarian fibroma: ~4% of ovarian tumors
- ovarian fibrothecoma: ~1% of ovarian tumors
- ovarian thecoma: ~1% of ovarian tumors
- sclerosing stromal tumor of the ovary: rare 2
- ovarian Sertoli-Leydig cell tumor / ovarian chondroblastoma: ~0.5% of ovarian tumors
- granulosa cell tumor of ovary: most common malignant sex cord tumor
Radiographic features
Initial imaging modality to evaluate sex cord-stromal tumors is ultrasound. Large mass with heterogenous appearance is commonly seen 3.
These ovarian tumors tend to be unilateral, homogeneous, and tend to be solid (although may be cystic and solid). For individual appearances, see the subarticles.