germ cell tumor

A neoplasm derived from germ cells, which normally occur inside the gonads (ovary and testis).
Ones that originate outside the gonads may be birth defects resulting from errors during development of the embryo.
They can be cancerous or benign.

(Types)
- Germinomatous (seminomatous) germ cell tumors
- - Germinoma (extragonadal)
- - Dysgerminoma (in ovary)
- - Seminoma (in testicle)
- Nongerminomatous (nonseminomatous) germ cell tumors
- - Embryonal carcinoma
- - Endodermal sinus tumor (yolk sac tumor)
- - Choriocarcinoma
- - Teratoma (in ovary, testicle, or coccyx)
- - Polyembryoma (in ovary)
- - Gonadoblastoma