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. 2021 Feb 5;100(5):e24460. doi: 10.1097/MD.0000000000024460

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Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the Creative Commons Attribution License 4.0 (CCBY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0

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Light microscopy shows staining with periodic acid-Schiff (PAS) and periodic acid–methenamine silver stain (PAM). Original magnification × 200 (A, B) Glomerulus exhibits massive subendothelial deposits, such as wire loop lesion and endocapillary proliferation. (C) Glomerulus displays cellular crescents and endocapillary proliferation. Immunofluorescence of kidney biopsy shows staining with (D) IgG, (E) IgM, (F) IgA, (G) C1q, (H) C3c, (I) C4d. Original magnification × 200. Electron microscopy shows mesangial and endothelial unorganized electron dense deposit, in (J) low and (K) high magnification.