Cutaneous Metastasis in Patient With Relapse Case of Primary Testicular Lymphoma.

Non-Hodgkin's lymphoma originates in the lymphatic system, specifically affecting B or T lymphocytes. Non-Hodgkin's lymphoma of the testis is highly aggressive extranodal lymphoma originating from the testicles, constituting 1%-2% of all non-Hodgkin's lymphoma cases. Relapse is reported in non-Hodgkin's lymphoma of the testes, commonly in the contralateral testis and central nervous system, occurring within 1-2 years from diagnosis of primary lymphoma. Skin metastases occur in 6% to 13% of testicular lymphoma. Diffuse large B-cell lymphoma is the most common type of testicular lymphoma, typically expressing CD19, CD20, CD22, CD79a, and PAX5 markers. Hereby, we have presented a case of cutaneous metastasis in a patient who underwent remission for 8 years following the treatment of primary testicular lymphoma. Identical immunohistochemical markers from the testis and skin lesion suggested cutaneous metastasis of testicular B cell lymphoma.