extragonadal germ cell cancer (MONDO_0003113) is a malignant germ cell tumor that develops as a primary tumor in an anatomic site other than the testis or ovary. Also known as: extragonadal germ cell malignant tumor, extragonadal germ cell malignant tumour, extragonadal germ cell tumor, malignant, malignant extragonadal germ cell tumor, malignant extragonadal germ cell tumour, malignant neoplasm of extragonadal germ cell, malignant neoplasm of the extragonadal germ cell, malignant tumor of extragonadal germ cell.