Prolymphocytic Leukemia of Helper Cell Phenotype: Report of a Case and Review of the Scientific Literature

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Abstract
A case of prolymphocytic leukemia was studied by using light and electron microscopy, cytochemistry and multiple immunological markers for T and B lymphocytes. Cytochemical and immunological studies showed that the cells were Tlymphocytes. By using monoclonal antibodies to human T-cell subsets, we found that these cells had the T-helper cell phenotype. The usefulness of multiparameter studies in subclassifying T-cell malignancies is discussed and the literature on T-prolymphocytic leukemia reviewed.