[Seminoma metastases as a retroperitoneal space tumor]

This is a case report of a testicular tumor, probably seminoma, presenting a retroperitoneal mass. The patient underwent surgical removal of tumor and the possibility of testicular tumor on the basis of histological examination was assumed. However, the histological examination of the testicle did not confirm the diagnosis of seminoma. The patient did not give consent for adjuvant chemotherapy. He has been remaining under clinical follow-up.