Mixed Germ Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A malignant germ cell tumor characterized by the presence of at least two different germ cell tumor components. The different germ cell tumor components include choriocarcinoma, embryonal carcinoma, yolk sac tumor, teratoma, and seminoma. It occurs in the ovary, testis, and extragonadal sites including central nervous system and mediastinum.

**Synonyms:** - Combined Germ Cell Neoplasm - Combined Germ Cell Tumor - Mixed Germ Cell Neoplasm - Mixed germ cell tumor