Tuberculous pleural effusions: lymphocyte phenotypes in comparison with other lymphocyte-rich effusions.
This study investigated whether the analysis of T cell subsets and of activation markers on T cells in pleural fluids can be helpful for diagnostic purposes in tuberculous pleurisy and other lymphocyte-rich pleural effusions. Pleural effusion fluids were obtained from 18 patients with tuberculous pleurisy (TB), 21 with effusions following radiotherapy (RT) for a malignant disease, and 11 with congestive heart failure (CHF). Lymphocyte subsets were analyzed by a battery of monoclonal antibodies using an immunoperoxidase method. The majority of the lymphocytes were CD3-positive T cells (TB, 86 +/- 7% of lymphocytes; RT, 81 +/- 8%; CHF, 84 +/- 12%). The ratios of CD4-positive helper-inducer to CD8-positive suppressor-cytotoxic T cells were higher than those reported for the peripheral blood but not significantly different between the study groups (TB, 3.3 +/- 1.9; RT, 2.8 +/- 1.4; CHF, 2.5 +/- 1.1). The activation marker studies revealed that only a few pleural T cells were positive for CD38, CD25 (interleukin-2 receptor), HLA-DR antigen, and OKT9 (transferrin receptor), the proportion of CD25-positive T cells being higher in TB and in RT than in CHF and the proportion of HLA-DR-positive T cells being higher in TB than in CHF (P less than 0.05). Significant differences were not observed relative to the natural killer-cytotoxic phenotypes staining positive for Leu-7 or for CD16. Thus, we concluded that phenotypic analysis of lymphocytes is of limited diagnostic usefulness to differentiate tuberculous from other nonmalignant effusions.
Guzman
J
J
Ludwig-Aschoff-Haus, Pathologisches Institute der Universität, Freiburg, West Germany.
Bross
K J
KJ
Würtemberger
G
G
Freudenberg
N
N
Costabel
U
U
D000293:Adolescent; D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal; D006801:Humans; D007124:Immunoenzyme Techniques; D008875:Middle Aged; D010641:Phenotype; D010996:Pleural Effusion / Q000473:pathology*; D013601:T-Lymphocytes / Q000145:classification* / Q000648:ultrastructure; D014396:Tuberculosis, Pleural / Q000473:pathology*
D000911:Antibodies, Monoclonal