mixed germ cell tumor testicular mixed germ cell tumor NCIt:C6347 mixed germ cell tumor of testis A malignant germ cell tumor that arises from the testis and is characterized by the presence of more than one histologic component. Representative examples include mixed choriocarcinoma and embryonal carcinoma, mixed embryonal carcinoma and seminoma, and mixed yolk sac tumor and teratoma. mixed testicular germ cell tumour DOID:4743