title: Multimarker analysis of T-cell chronic lymphocytic leukemia.
abstract: A 68-yr-old male with chronic lymphocytic leukemia (CLL) presented with splenomegaly and skin infiltration but no lymphadenopathy. The peripheral blood WBC cound was 300 x 10(9)/liter, with 95% small mature-appearing lymphocytes that were E-rosette positive and EAC-rosette negative. Further characterization of the patient's cells was performed using antisera with known lymphoid sub-population specificity. Anti-p23,30, which reacts with normal circulating B cells but not with T cells or thymocytes, was unreactive with the patient's cells. Anti-311, which reacts with both thymocytes and circulating T cells, was reactive with the patient's cells. Anti-Bk, which reacts only with thymocytes and not with circulating T-cells, failed to react with the patient's cells. The enzyme terminal deoxynucleotidyl transferase, present in thymocytes but absent for circulating T-cells, was also absent from the patient's lymphoid cells. Multimarker analysis therefore showed a mature T-lymphocyte phenotype on this patient's leukemia cells. Further functional analysis will probably show that such cells represent clonal expansion of a mature T-cell subpopulation, analogous to the B-cell clonality of common-variant CLL.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000368:Aged; D005455:Fluorescent Antibody Technique; D006801:Humans; D007945:Leukemia, Lymphoid / Q000276:immunology*; D008297:Male; D010503:Periodic Acid-Schiff Reaction; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000276:immunology*; D013644:Tartrates / Q000378:metabolism
chemical_list: D013644:Tartrates; D000135:Acid Phosphatase