Malignant Mediastinal Germ Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** An extragonadal malignant germ cell tumor that arises from the mediastinum. This category includes seminoma, embryonal carcinoma, yolk sac tumor, choriocarcinoma, mixed germ cell tumors, and immature malignant teratoma.

**Synonyms:** - Malignant Germ Cell Neoplasm of Mediastinum - Malignant Germ Cell Neoplasm of the Mediastinum - Malignant Germ Cell Tumor of Mediastinum - Malignant Germ Cell Tumor of the Mediastinum - Malignant Mediastinal Germ Cell Neoplasm - Mediastinal Malignant Germ Cell Tumor - Thymic Malignant Germ Cell Tumor