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[A case of polyneuropathy by microscopic polyarteritis nodosa]
1Department of Neurology, Dokkyo University School of Medicine, Tochigi, Japan.
No to Shinkei = Brain and Nerve
|February 16, 1999
Summary
Microscopic polyangitis can present as chronic sensorimotor polyneuropathy, mimicking other conditions. Prompt diagnosis and treatment with corticosteroids and azathioprine led to recovery and remission of vasculitis.
Area of Science:
- Neurology
- Nephrology
- Rheumatology
Background:
- Chronic sensorimotor polyneuropathy can be challenging to diagnose.
- Systemic vasculitis may present with neurological manifestations.
Observation:
- A 59-year-old man presented with polyneuropathy symptoms similar to chronic inflammatory demyelinating polyneuropathy.
- Nerve biopsy showed myelinated fiber loss and epineural vasculitis.
- Renal biopsy revealed necrotizing glomerulonephritis with crescents, alongside positive pANCA and reduced creatinine clearance.
Findings:
- The patient was diagnosed with microscopic polyangitis based on clinical and biopsy findings.
- Treatment with prednisolone, azathioprine, and initial ethylprednisolone pulse therapy was effective.
- The patient achieved remission, with pANCA becoming undetectable.
Implications:
- Vasculitic neuropathy should be considered in the differential diagnosis of polyneuropathy.
- Early diagnosis and multimodal treatment are crucial for managing microscopic polyangitis.
- This case highlights the importance of investigating systemic causes for seemingly isolated neurological deficits.