Fig. 1: Numerous polymorphonucleated cells infiltrate the wall of a small artery in the submucosa of the ileum (Ematoxylin eosin x 400).
	Fig. 2: Glomerular cell proliferation with crescent formation, fibrin deposition and some polymorphs. A pericapsular inflammatory infiltrate is also visible (Trichrome stain x 250).
	Fig. 3: Heavy deposition of IgA in the mesangium and, to a lesser extent, in the capillary walls (Immunofluorescence x 250).