NCIthesaurus disease has location malignant ovarian germ cell neoplasm immature teratoma of ovary A malignant ovarian germ cell neoplasm that is a teratoma containing variable amounts of immature (typically primitive/embryonal neuroectodermal) tissues, including, in its most primitive forms, embryoid bodies. DOID:6331 NCI:C8111 disease_ontology SNOMEDCT_US_2025_09_01:254871000 UMLS_CUI:C0346182 malignant teratoma of Ovary ovary