Figure 3

Renal infarction. Gross morphology shows a large pale lesion of the lower pole (A). Histological examination shows coagulative necrosis of renal parenchyma (B), aneurysmal distension of the arterial wall (C) and rupture of the internal elastic lamina (C, inset, arrow). Some vascular lumina are obliterated by fibrous stroma and recanalized by thin vascular channels (D). (B-D: Masson stain; O.M.: 40x; 20x; 40x).