Journal List > J Rheum Dis > v.19(3) > 1063968

Lee, Han, Kim, Lee, and Kang: A Case of Polyarteritis Nodosa Manifesting as a Neuropathy Following Influenza Infection

Abstract

Polyarteritis nodosa (PAN) is a necrotizing vasculitis of the medium-sized arteries. The symptoms and signs of PAN include purpuric skin lesions, mononeuritis multiplex, symptoms of mesenteric ischemia, and renal involvement. We report the first case of PAN manifesting as a neuropathy after influenza infection in Korea. A 68-year-old woman had fever, myalgia, hyperesthesia of both hand and foot, and lower extremity weakness. EMG findings showed severe sensorimotor polyneuropathy, such as multiple mononeuritis. A sural nerve biopsy showed vasculitis and Influenza A (H1N1) were positive. Our patient was treated by glucocorticoid and oral cyclophosphamide, thereafter, symptoms and signs improved. No recurrence has been observed for five months.

Figures and Tables

Figure 1
Chest images (A) Chest x-ray is normal without nodule or infiltration, (B) Chest CT shows normal lung and mediastinal structures.
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Figure 2
EMG findings showed positive sharp waves and fibrillations in the right abductor pollicis brevis. Electrophysiological findings are in accordance with severe sensorimotor polyneuropathy, such as mononeuritis multiplex.
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Figure 3
Pathologic findings. (A) Moderate mononuclear inflammatory cell infiltrates are noted in small sized epinurial vessels (H&E, ×200). (B) Some epineurial vessels shows wall thickening and infiltrated with mononuclear inflammatory cells (H&E, ×400).
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