Figure 1.
Acute tubular injury and immune cell infiltration in coronavirus disease 2019 kidneys. (A) The renal cortex on light microscopy shows acute tubular injury with lumina ectasia (hematoxylin and eosin [HE] stain, original magnification ×20). (B) Mild mononuclear interstitial infiltration and peritubular capillary congestion is noted (HE stain, original magnification ×40). (C and D) Peritubular capillaritis (arrow) is a notable feature within congested capillaries (C). The microvascular inflammation is composed of CD3-positive T cells (E) and CD68-positive macrophages (F) (original magnification ×40 for E and F).