A malignant germ cell tumor other than dysgerminoma that arises from the ovary. The disease is malignant non-dysgerminomatous germ cell tumor of ovary (MONDO_0016096). Also known as: non-dysgerminomatous germ cell cancer of ovary, ovarian Nondysgerminomatous germ cell tumor, ovarian Nondysgerminomatous germ cell tumour, ovarian non-dysgerminomatous germ cell tumor, ovarian non-dysgerminomatous germ cell tumour.