title: Heterogeneity of T-cell neoplasias as defined by monoclonal antibodies.
abstract: Surface marker studies were carried out on neoplastic cell samples (peripheral aspirates and skin biopsies) of 302 patients with non-Hodgkin lymphomas (221 patients) and acute lymphatic leukaemias (81 patients). In 11 patients with non-Hodgkin lymphomas (5%) and eight patients with acute lymphatic leukaemia (10%), the neoplastic cells possessed phenotypic characteristics of T cells. The investigations were carried out by means of an indirect immunofluorescence technique using a panel of monoclonal antibodies (OKT 3, 4, 6, 8, 9, 10; OKM 1; HNK 1 and VIL A 1). In addition, conventional markers (SIg, E-R 4 degrees, E-R 37 degrees, absorbed polyclonal rabbit antithymus and anti-TDT) were used. Our results, which show a pronounced phenotypic surface marker heterogeneity between the group of T-cell neoplasias, emphasize the diagnostic value of monoclonal antisera as compared to polyclonal reagents. Eleven different surface marker profiles were observed in the 19 patients investigated.
mesh_terms: D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000276:immunology*; D002454:Cell Differentiation; D002648:Child; D006801:Humans; D007938:Leukemia / Q000276:immunology*; D007945:Leukemia, Lymphoid / Q000276:immunology; D008223:Lymphoma / Q000276:immunology*; D008875:Middle Aged; D010641:Phenotype; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal