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Related Experiment Videos

Necrotizing lymphadenitis. Electron microscopical and immunohistochemical study.

S Asano1, H Kanno, K Tominaga

  • 1First Department of Pathology, Fukushima Medical College, Japan.

Acta Pathologica Japonica
|July 1, 1987
PubMed
Summary

Necrotizing lymphadenitis (NEL) in young adults presents with fever, leukopenia, and lymphadenopathy. T-lymphocyte imbalance and cellular debris characterize this condition, suggesting lymphocytes are primarily involved.

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Area of Science:

  • Immunology
  • Pathology
  • Virology

Background:

  • Necrotizing lymphadenitis (NEL) is a rare condition affecting young adults.
  • Clinical presentation includes painful cervical lymphadenopathy, fever, and leukopenia.
  • Associated conditions include non-bacterial meningitis and bone marrow monocyte/macrophage proliferation.

Purpose of the Study:

  • To report seven cases of necrotizing lymphadenitis.
  • To describe the clinical, morphological, and ultrastructural features of NEL.
  • To investigate the role of T-lymphocytes in the pathogenesis of NEL.

Main Methods:

  • Case series reporting.
  • Morphological analysis of lymph node biopsies.
  • Ultrastructural examination of cellular inclusions.

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  • Immunohistochemical studies of T-lymphocyte subsets.

    • Main Results:

    • Morphology showed lymphocyte debris, blastoid cells, immunoblasts, and macrophages.
    • Ultrastructural analysis revealed tubular inclusions related to the endoplasmic reticulum.
    • Immunohistochemistry indicated a decreased helper/suppressor T-lymphocyte ratio during active disease.
    • Suppressor cells comprised transformed lymphocytes and immunoblasts; helper cells showed degeneration.

    Conclusions:

    • T-lymphocytes are significantly involved in necrotizing lymphadenitis.
    • Lymphocyte degeneration and blastoid transformation are key features.
    • The exact causative agent and pathogenesis of NEL remain uncertain.