AJKD Atlas of Renal Pathology: Chronic Pyelonephritis Agnes B. Fogo, MD, Mark A. Lusco, MD, Behzad Najafian, MD, Charles E. Alpers, MD  American Journal of Kidney Diseases  Volume 68, Issue 4, Pages e23-e25 (October 2016) DOI: 10.1053/j.ajkd.2016.08.001 Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions

Figure 1 Chronic pyelonephritis with scarring in a geographic pattern (Jones silver stain). Reproduced with permission from AJKD 35(3):e7-e8. American Journal of Kidney Diseases 2016 68, e23-e25DOI: (10.1053/j.ajkd.2016.08.001) Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions

Figure 2 Chronic pyelonephritis with focal and segmental glomerulosclerosis with periglomerular fibrosis (Jones silver stain). Reproduced with permission from AJKD 35(3):e7-e8. American Journal of Kidney Diseases 2016 68, e23-e25DOI: (10.1053/j.ajkd.2016.08.001) Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions

Figure 3 Chronic pyelonephritis with foci of intratubular neutrophils and degenerated cells with disproportionate interstitial inflammation suggesting a subacute component (hematoxylin and eosin stain). Reproduced with permission from AJKD 35(3):e7-e8. American Journal of Kidney Diseases 2016 68, e23-e25DOI: (10.1053/j.ajkd.2016.08.001) Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions

Figure 4 Chronic pyelonephritis with geographic scarring and thyroidization of tubules (low [A] and high [B] power magnification; periodic acid–Schiff stain). American Journal of Kidney Diseases 2016 68, e23-e25DOI: (10.1053/j.ajkd.2016.08.001) Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions

Figure 5 Chronic pyelonephritis with no immune complex deposits and limited foot process effacement, a feature distinguishing secondary segmental sclerosis from a primary focal segmental glomerulosclerosis (electron microscopy). Reproduced with permission from AJKD 35(3):e7-e8. American Journal of Kidney Diseases 2016 68, e23-e25DOI: (10.1053/j.ajkd.2016.08.001) Copyright © 2016 National Kidney Foundation, Inc. Terms and Conditions