Postinfectious glomerulonephritis

High power light micrograph showing marked cellular proliferation and neutrophilic infiltration (arrows) within the glomerular tuft in postinfectious glomerulonephritis. Few open capillary lumens can be seen.

Light micrograph of a normal glomerulus. There are only one or two cells per capillary tuft, the capillary lumens are open, the thickness of the glomerular capillary wall (long arrow) is similar to that of the tubular basement membranes (short arrow), and the mesangial cells and mesangial matrix are located in the central or stalk regions of the tuft (arrows).