title: [Changes in the ratio of T-lymphocyte subpopulations in various cytological samples of Plummer's thyroid adenoma].
abstract: In order to correlate possible alterations of cell-mediated immune response with the evolutive phases of Plummer Adenoma (P. A.), T lymphocytes subpopulations in FNA samples and in peripheral blood lymphocytes (PBL) have been studied in 5 patients with autonomous nodules. The lymphocyte component in FNA and peripheral blood has been isolated by Lymphoprep gradient centrifugation; the analysis of T helper and T suppressor subpopulations was made by indirect immunofluorescence with OKT8 and OKT4 monoclonal antibodies. Our results show a reduction in OKT4/OKT8 ratio in cytological samples compared with PBL in patients with P. A., while in control subjects there was not statistically significant difference. In the patients with P. A., the relative increase of OKT8 lymphocytes in FNA compared with PBL is correlated with the functional state, that is toxic adenomas have a lower OKT4/OKT8 ratio compared with nodules in pre-toxic phase.
  
  
  CONCLUSIONS
  T lymphocyte subpopulations typing in FNA demonstrate that, even in this type of hyperthyroidism, immune response disorders are present and consist of relative increase of suppressor/cytotoxic T cells, compared to T helper cells.
mesh_terms: D000236:Adenoma / Q000097:blood / Q000276:immunology* / Q000473:pathology; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000145:classification* / Q000166:cytology / Q000276:immunology; D013964:Thyroid Neoplasms / Q000097:blood / Q000276:immunology* / Q000473:pathology; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine
vernacular_title: Ecarts dans le rapport des sous-groupes de T-lymphocytes dans divers échantillons cytologiques de l'adénome thyroïdien de Plummer.