A Case of Polyarteritis Nodosa Associated with Cytomegalovirus Infection

Figure 1

Biopsy findings of left biceps muscle. Inflammatory cells infiltrated perivascular area and variation in muscle fiber size and central nucleation were seen, indicating the presence of myositis. Medium-sized artery showed stenosis and occlusion of lumen with fibrinoid necrosis, indicating necrotizing vasculitis. No formation of granuloma was seen.