Testis tumour is relatively rare and more frequent between 15-35 years of age. The 90% of this tumour derivates from germinal cells, the remaining cases originate from stromal cells or are secondary lesions from other neoplasms. The present clinical use of serum markers, especially alfa-fetoprotein (AFP), human chorionic gonadotrophin protein (HCG) and serum lactate dehydrogenase (LDH) is examined.