MONDO_0003508 (choriocarcinoma of testis) is a malignant germ cell tumor arising from the testis. It represents the rarest of the testicular germ cell tumors. Histologically it is characterized by the presence of syncytiotrophoblasts and cytotrophoblasts. Also known as: choriocarcinoma of the testis, testicular choriocarcinoma, testis choriocarcinoma (disease).