Characteristic feature is the identification of intimately related syncytiotrophoblasts and cytotrophoblasts without formation of definite placental type villi. Since<unk> s include syncytiotrophoblasts (beta-HCG producing cells), they cause elevated blood levels of beta-human chorionic gonadotropin. Syncytiotrophoblasts are large multi-nucleated cells with eosinophilic cytoplasm. They often surround the cytotrophoblasts, reminiscent of their normal anatomical relationship in chorionic villi. Cytotrophoblasts are polyhedral, mononuclear cells with hyperchromatic nuclei and a clear or pale cytoplasm. Extensive hemorrhage is a common finding. Image:<unk>  - high mag. High mag. Image:<unk>  - very high mag. Very high mag.
Choriocarcinoma
Embryoma
Embryonal carcinoma
Seminoma
Teratoma
Endometrioid tumor
Leiomyosarcoma
Adenomyoma