Abstract
A case of primary testicular malignant lymphoma is reported. A 82-year-old male was admitted to our hospital, complaining of fever and swelling of the right scrotum. Aspiration cytology of swelled scrotum revealed large round cells and small lymphoid cells, which are not conjugated each other. In the begining, seminoma was suspected. In theresected testis, tumor cells consisted of diffuse proliferation of large and medium sized lymphoma cells, immunologically positive for LCA, L 26 and MB-1. Non-Hodgkin's lymphoma, diffuse mixed type was diagnosed. Seminoma was cytologically characterized by a two cell pattern composed of large tumor cells with prominent nucleoli, and lymphocytes and positive for PAS stain. Non-Hodgkin's lymphoma, mixed type revealed large and medium sized lymphoma cells. Testicular lymphoma was frequent in men over 50 years of age. In the cytological diagnosis, PAS stain and immunohistochemical study were effective methods for differential diagnosis of malignant lymphoma and seminoma of the testis.
