This is an acute renal infarction. Note the wedge shape of this zone of coagulative necrosis resulting from loss of blood supply with resultant tissue ischemia that produces the pale infarct. The small amount of blood supply from the capsule supplies the immediate subcortical zone. The remaining cortex is congested, as is the medulla. Such an infarct might produce pain felt in the abdomen or flank. Hematuria could be present. Since only a small portion of cortex is affected, renal function should be unaffected.