Renal blood vessel occlusion results in renal infarction—the formation of a coagulated, necrotic area in one or both kidneys. The location and size of the infarction depend on the site of
vascular occlusion. Most commonly, infarction affects the renal cortex but it can extend into the medulla. (See Sites of renal infarction.) Residual renal function after infarction depends on the extent of the damage from the infarction.