TESTIS - Teratoma and choriocarcinoma

The specimen consists of approximately half a testicular tumour (there is nothing about the specimen that identifies it as testis). The cut surface shows no recognisable testicular tissue except perhaps near the apex of the specimen; there is a circumscribed pale nodule in which there are cystic areas while the rest of the surface shows small cysts and areas of haemorrhage. The microscopy of the tissue is that of a teratoma with areas of choriocarcinoma.
This lesion came from a 20-year-old man; the outcome is not known.