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Photomicrographs in hematoxylin-eosin stained section. (A) Original magnification ×10 showing granulomatous nodules with necrosis and sclerosis; (B) original magnification ×40 showing granulomatous structure; (C) original magnification ×20 showing neutrophilic and eosinophilic infiltrate, with multinucleated giant cells. The surrounding renal parenchyma was spared.
