[Mixed "organoid" tumor or the testis: general considerations. Report of a case]

Presentation of one case of mixed testicular tumour in a 31-year-old male patient. Since this is the association in the same organ of an "organoid" teratoma plus a seminoma, the histological diversity, frequency, as well as the analysis of the controversies and criteria for its therapeutical approach are all discussed. Also, several histological theories on the genesis of mixed testicular tumours are explained. Prognosis and evolution after treatment of the present case is included.