MONDO_0003578 (extragonadal nonseminomatous germ cell tumor) is a malignant non-seminomatous germ cell tumor that develops as a primary tumor in an anatomic site other than the testis or ovary. Also known as: cancer of extragonadal non-seminomatous germ cell, cancer of the extragonadal non-seminomatous germ cell, extragonadal non-seminomatous germ cell cancer, extragonadal primary Nonseminoma, malignant extragonadal Nonseminoma, malignant extragonadal non-seminomatous germ cell neoplasm, malignant extragonadal non-seminomatous germ cell tumor, malignant extragonadal non-seminomatous germ cell tumour.