Lymphomas.

The diagnosis of lymphoma currently relies on a combination of clinical, routine histopathologic, and immunohistochemical studies, sometimes supplemented by other special techniques such as flow cytometry, DNA analysis, and gene rearrangement study. This review considers the practical diagnosis of cutaneous lymphoma, with particular emphasis on three areas: Hodgkin's disease, non-Hodgkin's lymphomas and their differentiation from lymphocytoma cutis, and mycosis fungoides and other T-cell lymphomas.