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[Nerve and muscle microvasculitis: 50 cases].

D Vincent, F Dubas, J J Hauw

    Revue Neurologique
    |January 1, 1985
    PubMed
    Summary
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    Microvasculitis (MV) in nerve and muscle biopsies is often linked to connective tissue diseases and malignancies. Mononuclear cell infiltration is a key diagnostic feature in these cases.

    Area of Science:

    • Neuropathology
    • Vascular Biology
    • Rheumatology

    Context:

    • A retrospective study analyzed 50 nerve and muscle biopsy cases with microvasculitis (MV).
    • Biopsies were performed over 5 years at the Laboratoire de Neuropathologie Charles Foix.
    • Exclusions included large-artery vasculitis, polymyositis, sarcoidosis, and acute polyneuritis.

    Purpose:

    • To characterize the histopathological findings and etiological associations of nerve and muscle microvasculitis.
    • To identify diagnostic features of MV in peripheral nerve and muscle tissue.
    • To explore the relationship between MV and various systemic conditions.

    Summary:

    • Mononuclear cell infiltration was the predominant finding in MV biopsies, with leukocytoclasis in 2 cases and no fibrinoid necrosis.

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  • Diagnostic changes were observed in nerve tissue and the connective tissue of the epi- or perimysium.
  • Etiologies included connective tissue diseases (42%), malignancies (28%), and other systemic diseases or trauma.

    • Impact:

    • Highlights the diagnostic significance of specific histopathological patterns in MV.
    • Underscores the frequent association of MV with systemic conditions, guiding further investigation.
    • Provides insights into the differential diagnosis of peripheral neuropathy and myopathy.