Nonsystemic Vasculitic Neuropathy Presenting as Inflammatory Demyelinating Polyradiculoneuropathy.
Tony Zhang, JaNean K Engelstad, P James B Dyck
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Case in brief
A 57-year-old man presented with acute ascending weakness, sensory loss, and facial weakness following a febrile illness. Initial improvement was followed by neurological decline despite treatment. Nerve conduction studies indicated features consistent with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), but a sural nerve biopsy revealed vasculitic neuropathy. Treatment with corticosteroids and rituximab led to complete recovery.
What made this case unusual
This case highlights nonsystemic vasculitic neuropathy presenting as a severe symmetric demyelinating polyradiculoneuropathy, which is atypical for this condition.
Diagnostic / clinical pearl
Clinicians should consider vasculitic neuropathy in cases of demyelinating neuropathy that do not respond to standard CIDP treatments, especially when accompanied by neuropathic pain.
Why it matters
This case underscores the importance of peripheral nerve biopsy in diagnosing atypical inflammatory neuropathies, which can significantly alter management and outcomes.