CD30-positive anaplastic variant diffuse large B cell lymphoma: a rare case presented with cutaneous involvement.

A 67-year-old man suffered from a left cervical lymph node swelling and tenderness. Biopsy of the cervical lymph node showed pleomorphic large cells containing large atypical nuclei. Immunohistochemical stains of these cells were positive for CD30, but negative for CD3 and CD20. After the biopsy, his left cervical skin was ulcerated. Biopsy of the left cervical skin was performed. Large pleomorphic cells with constricted nuclei and Reed-Sternberg-like cells existed in the dermis and epidermis. Immunohistochemical stains of the former cells were positive for CD30, CD45 and PAX5, but negative for CD3, CD10, CD20, CD15, Bcl-2, EBER ISH, EMA and ALK. He was diagnosed with diffuse large B cell lymphoma, anaplastic variant. He achieved complete remission with CHOP chemotherapy. CD30-positive DLBCL, anaplastic variant is a rare B cell lymphoma. Most of the patients presented with primary nodal disease, and skin involvement of lymphoma is very rare. This is the report of a rare case of CD30-positive DLBCL, anaplastic variant, with both nodal and skin lesions.