Primary testicular diffuse large B-cell lymphoma with cutaneous metastasis to the chest: a case report.

We present the case of primary testicular diffuse large B-cell lymphoma diagnosed at the stage of pectoral skin metastasis in a 40-year-old male patient. He presented with a painless mass in the left scrotum that was complicated by ulcerated gynecomastia. An orchiectomy combined with a pectoral tumorectomy led to this diagnosis. The tumor was of the non-centro-germinative B subtype and classified as pT3NxM1b, Ann-Arbor stage IV E. The patient died while undergoing chemotherapy. This case underscores the poor prognosis associated with this histological type and the value of immunohistochemistry in diagnosis.