Primary cutaneous diffuse large B-cell lymphoma (PCDLBCL) leg type is an aggressive type of CBCL, characterized by skin lesions mainly on the legs and a predominance of diffuse sheets of centroblasts and immunoblasts. Given the poor prognosis, old age at onset, frequent relapses, and extracutaneous spread, PCDLBCL, leg type is a distinct type of cutaneous lyphoma. Here the clinicopathology of extranodal lymphomas will be discussed.
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