A rare case of CD20− primary cutaneous diffuse large B-cell lymphoma, leg type

This is the authors' abstract. We don't add key points for this paper.

Primary cutaneous diffuse large B-cell lymphoma, leg type (PCDLBCL, LT) is rare disease with an unfavorable prognosis and is the most aggressive type of cutaneous B-cell lymphoma.1-3 The diagnosis is characterized by erythematous tumors frequently presenting on the lower portion of the leg(s) and the absence of extracutaneous manifestations upon initial diagnosis, distinguishing it from the comparatively more prevalent systemic variant known as diffuse large B-cell lymphoma (DLBCL). Histologically both PCDLBCL, LT and DLBCL are characterized by a monomorphous proliferation of centroblasts and/or immunoblasts.