Granulomatosis with Polyangiitis Localized in the Greater Omentum

Figure 3

Mononuclear cell and neutrophil infiltration to the perivascular and vascular walls. (a) Vessel wall destruction is more severe in the vein than in the artery. (b) The vessels are surrounded by epithelioid granuloma and multinucleated giant cells. (c) Palisading granuloma is seen.

(a)

(b)

(c)