[A case of primary testicular malignant lymphoma associated with contralateral testicural recurrence after a seven-year interval].

A 70-year-old male presented to our hospital in October 1999 complaining of right scrotal swelling. Right high ligation of testis was performed. Pathological examination demonstrated a diffuse large B-cell lymphoma (DLBCL) originating from the right testis. He underwent four courses of adjuvant chemotherapy consisting of CHOP (cyclophosphamide, doxorubicin, vincristin, prednisone) together with 40 Gy radiotherapy to the contralateral testis. Following this treatment he achieved complete remission. Seven years later in March 2006, he developed swelling of the left scrotum. He underwent left high orchidectomy based on the suspicion of a contralateral testicular malignant lymphoma. Pathological examination of the testicular specimen confirmed a diagnosis of DLBCL. He underwent chemotherapy and has survived without evidence of recurrence. We have summarized the cases of bilateral asynchrony primary testicular lymphoma.