[Metastatic adult teratoma of the testis. Possibilities of chemotherapy and surgical treatment].

We report on a patient with the diagnosis of an adult teratoma metastasizing as choriocarcinoma. The 49-year-old man died of dysfunction of the liver caused by massive metastatic involvement. This case demonstrates the malignant potential of adult teratoma and emphasizes the need for chemotherapy of the same kind as for other malignant germ cell tumours if undifferentiated metastases of the teratoma are present. The chemotherapeutic modalities and the options for surgical treatment of metastatic adult teratomas of the testis are discussed.