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Polyneuropathy and systemic vasculitis. An electrophysiological study.

G Pavesi, F Gemignani, P Manganelli

    Italian Journal of Neurological Sciences
    |April 1, 1987
    PubMed
    Summary
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    Systemic vasculitis can cause symmetrical distal polyneuropathy, affecting nerves in the limbs. Sensory nerve involvement, particularly reduced sural nerve action potential amplitude, is a common finding in these patients.

    Area of Science:

    • Neurology
    • Rheumatology
    • Immunology

    Background:

    • Systemic vasculitis is a group of autoimmune diseases characterized by inflammation of blood vessels.
    • Peripheral neuropathy can be a neurological complication of systemic vasculitis, impacting patient quality of life.

    Purpose of the Study:

    • To investigate the clinical and electrophysiological characteristics of peripheral nerve involvement in patients with systemic vasculitis.
    • To determine the spectrum and common findings of polyneuropathy in systemic vasculitis.

    Main Methods:

    • Retrospective review of 18 patients with systemic vasculitis and symmetrical distal polyneuropathy.
    • Electrophysiological studies including motor and sensory nerve conduction velocity and electromyography.
    • Sural nerve biopsy in a subset of patients.

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    Main Results:

    • Symmetrical distal polyneuropathy was identified in 18 patients with systemic vasculitis.
    • Electromyography showed neurogenic changes in the distal lower limbs of most patients.
    • Reduced sural nerve sensory action potential amplitude was the most frequent finding, observed in 14 out of 16 patients.

    Conclusions:

    • Systemic vasculitis frequently involves peripheral nerves, presenting as symmetrical distal polyneuropathy.
    • Impaired sensory nerve action potentials are common, while conduction velocities may be relatively preserved.
    • Sural nerve biopsy findings suggest axonal degeneration as a key pathological process.