Figure 2From: Granulomatosis with polyangiitis presenting as an orbital inflammatory pseudotumor: a case report Histology of the right orbital tumor. Photomicrographs of the right orbital pseudotumor showing vasculitis of a medium-sized artery (hematoxylin and eosin staining). (A) The medium-sized artery is obliterated by concentric inflammation. (B) Granulomatous inflammation with a multinucleated giant cell is noted (arrow).Back to article page