Sézary’s Syndrome: A Case with Blood T-Lymphocytes of Helper Phenotype, Elevated IgE Levels and Circulating Immune Complexes

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Abstract
A patient with Sézary’s syndrome is described. Surface marker analysis of her peripheral blood lymphocytes exhibit a phenotype characteristic of mature helper T cells (OKT3+, OKT4+, OKT8––, OKT6––). Serological studies revealed a polyclonal hyperimmunoglobulinemia with large amounts of IgE and IgA and circulating immune complexes that activate the complementary system via alternative pathway. The patient’s cells showed a helper activity on normal B cell differentiation after a 7-day co-culture with pokeweed mitogen. The relevance of this helper phenotype and the function on in vivo polyclonal B cell activation is discussed.