Aggressive nasal-type natural killer/T-cell lymphoma associated with Epstein Barr virus presenting as testicular tumor.

Background: Testicular lymphoma is a lethal disease with a median survival of approximately 12 to 24 months. Nasal-type natural killer/T-cell lymphoma of the testis is exceptional whether as a primary or secondary tumor.

Aim: The authors report on the comprehensive histopathologic, immunohistochemical and molecular analysis of a case of primary testicular nasal type NK/T cell lymphoma and review the features of previously reported cases.