Testicular extramedullary myeloid cell tumor: report of a case with unique clinicopathologic features and a brief review of the literature.

We report a case of testicular extramedullary myeloid cell tumor in a 37-year-old man who presented with an acute testicular hemorrhage. A pathologic examination revealed no gross tumor mass. A well-differentiated extramedullary myeloid cell tumor infiltrate was seen histologically, localized largely to the seminiferous tubules. The patient had no evidence of any past or concurrent myeloid disorders. The lack of the usual clinical features of a testicular mass and the presence of an intratubular pattern of infiltration can further compound the challenges in diagnosing this entity.