NCIthesaurus germ cell cancer extragonadal germ cell cancer UMLS_CUI:C1334581 NCI:C8881 UMLS_CUI:C0262963 A germ cell cancer that derives_from germ cells that are found in areas of the body other than the ovary or testicle. The tumors originate in the sperm forming cells in the testicles or egg producing cells in the ovary. NCI:C3918 DOID:5839 disease_ontology DOID:4717 extragonadal germ cell malignant tumor neoplasm of Extragonadal germ cell tumor of extragonadal germ cell