Tubular seminoma. Report of a case.

A 34-year-old man had a 1.5-cm-diameter solid, tan, right testicular tumor. Microscopic examination revealed a predominance of solid tubular structures containing cells with the characteristic features of seminoma cells. The neoplasm, which had a sparse lymphocytic infiltrate, was a rare tubular variant of seminoma, the architecture of which closely resembled that of a Sertoli cell tumor.