Photomicrographs of a kidney biopsy specimen from a patient with ANCA vasculitis showing segmental fibrinoid necrosis. Photomicrographs of a kidney biopsy.

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Photomicrographs of a kidney biopsy specimen from a patient with ANCA vasculitis showing segmental fibrinoid necrosis. Photomicrographs of a kidney biopsy specimen from a patient with ANCA vasculitis showing segmental fibrinoid necrosis. In a glomerulus (A) and an interlobular artery (B) (short arrows). The glomerulus has a small cellular crescent (long arrow), and a break in Bowman’s capsule in the upper left corner. (Masson trichrome stain.)‏ J. Charles Jennette, and Patrick H. Nachman CJASN 2017;12:1680-1691 ©2017 by American Society of Nephrology