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Related Experiment Videos

Immunological study in pleural effusion

S Gupta1, A J Bali, K Prakash

  • 1Department of Medicine, Lady Hardinge Medical College & Associated Smt SK Hospital, New Delhi.

The Journal of the Association of Physicians of India
|October 1, 1993
PubMed
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Peripheral blood T and B cell percentages differ in pleural effusion patients. Immunoglobulin ratios in pleural fluid versus peripheral blood can help differentiate between malignant and tubercular effusions.

Area of Science:

  • Immunology
  • Pulmonology
  • Oncology

Background:

  • Pleural effusion is a common clinical condition with diverse etiologies.
  • Understanding the immunological profile in pleural effusion is crucial for diagnosis and management.
  • Distinguishing between tubercular and malignant pleural effusions remains a diagnostic challenge.

Purpose of the Study:

  • To investigate T and B lymphocyte percentages and immunoglobulin levels (IgG, IgA, IgM) in pleural fluid (PF) and peripheral blood (PB) of patients with pleural effusion.
  • To compare these immunological parameters between tubercular and malignant effusions.
  • To identify potential biomarkers for differentiating between these two types of effusions.

Main Methods:

  • Study included 30 patients with pleural effusion (25 tubercular, 5 malignant) and 10 healthy controls.

Related Experiment Videos

  • Enumeration of T and B cell percentages in PF and PB.
  • Estimation of IgG, IgA, and IgM levels in PF and PB.
  • Calculation of PF/PB immunoglobulin ratios.

    • Main Results:

    • Patients with pleural effusion showed significantly lower T cell and higher B cell percentages in PB compared to controls.
    • In both patient groups, T cell percentages were higher and B cell percentages lower in PF compared to their respective PB.
    • PF/PB ratios for IgG, IgA, and IgM were less than unity. Cut-off values of 0.6 for IgG & IgA and 0.5 for IgM showed potential in differentiating malignant from tubercular effusions.

    Conclusions:

    • Immunological differences in T and B cell distribution exist between peripheral blood and pleural fluid in effusion patients.
    • While T and B cell percentages in PB and PF did not significantly differ between tubercular and malignant groups, immunoglobulin ratios show promise.
    • PF/PB immunoglobulin ratios, particularly for IgG, IgA, and IgM, may serve as valuable pointers for differentiating malignant from tubercular pleural effusions.