Development of Arthritis as the Initial Involvement in Adult-Onset Cutaneous Polyarteritis Nodosa: Two Cases and Literature Review

Figure 1

Histopathological findings from synovial tissue (a) and cutaneous tissue (b). The pathological specimens, which were stained with hematoxylin and eosin, display fibrinoid necrosis and luminal occlusion in the arteries as well as inflammatory cell infiltration (scale bar = 100 μm).

(a)

(b)