Testicular tumours represent 2% of all male malignancies, mostly concerning young men (20-40 years old). The polyembryoma is one of the uncommonest lesions and just recently it has been identified as autonomous nosographic entity. The reported case is peculiar because the patient was older than the most ones described in the literature and the tumour arose after polychemotherapy for non Hodgkins' disease. The Authors analyse some aspects concerning etiology, pathology and clinical approach to such rare neoplasm.