TESTIS - Teratoma

The testis is very markedly expanded by a semi-cystic tumour, showing areas of necrosis and haemorrhage. The surviving testicular tissue can be seen at several points at the periphery.
This man presented at the age of 28 with a six-month history of increasing swelling in the right testis. The testis was removed and is described as weighing 634 g. This histology is that of a malignant teratoma, intermediate. No tumour was found in the cord. He was subsequently found to have secondary deposits in the abdominal lymph nodes; these were removed and shown to contain tumour; he was later treated with irradiation and chemotherapy. One year later, he is alive and well.