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Angioimmunoblastic lymphadenopathy: light and electron microscopic studies

H Takahashi, H Wakasa

    The Tohoku Journal of Experimental Medicine
    |March 1, 1982
    PubMed
    Summary

    Angioimmunoblastic lymphadenopathy (AIL) in the elderly presents with constitutional symptoms and enlarged lymph nodes. Histologic subtypes correlate with survival, suggesting a B-cell disorder with malignant potential.

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    Area of Science:

    • Hematology
    • Oncology
    • Immunology

    Background:

    • Angioimmunoblastic lymphadenopathy (AIL) is a distinct clinicopathologic entity primarily affecting the elderly.
    • It is characterized by acute onset, constitutional symptoms, generalized lymphadenopathy, hepatosplenomegaly, and immune dysregulation.
    • AIL often has a rapid clinical course with severe infectious complications.

    Purpose of the Study:

    • To evaluate the significance of clinical and histologic features in 16 cases of angioimmunoblastic lymphadenopathy (AIL).
    • To identify distinct histologic subtypes and their correlation with clinical presentation and patient survival.
    • To investigate the underlying immunologic basis of AIL.

    Main Methods:

    • Retrospective analysis of 16 patient cases with AIL.
    • Histopathologic examination of lymph node biopsies to identify distinct subtypes: Angio-cellular (A-C) and Immunoblastic/lymphocyte-depleted (I&P/LD).
    • Clinical data review including symptoms, organomegaly, and survival; serum protein analysis in 12 cases.

    Main Results:

    • Two main histologic types were identified: A-C type (lymphocytes, immunoblasts, histiocytes, eosinophils, plasma cells) and I&P/LD type (mainly immunoblasts and plasmocytoid cells).
    • Dysproteinemia was observed in both A-C (5/6) and I&P/LD (5/6) types.
    • A significant relationship was found between histologic types and survival periods, with A-C type associated with better survival (slight lymphocyte depletion) and I&P/LD type with poorer survival (marked lymphocyte depletion).

    Conclusions:

    • Histologic classification of AIL into A-C and I&P/LD types is crucial for predicting survival.
    • AIL exhibits malignant potential and shares features with graft-versus-host disease but is distinguished by widespread involvement and clinical presentation.
    • Immunologic investigations suggest AIL is fundamentally a B-cell disorder.

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