Arterial thrombotic microangiopathy in hemolytic uremic syndrome

Panel A shows endothelial swelling, narrowing of the lumen, and intraluminal thrombus of an afferent arteriole. Panel B demonstrates shrunken and ischemic glomeruli. Panel C is an electron micrograph showing splitting of the capillary wall (arrowhead) and wrinkling of the glomerular basement membrane (arrow).