Appearance of renal infarction on computed tomography

We have recently seen three cases of renal infarction secondary to occlusion of renal arteries. Two of these cases had similar clinical presentations and were not diagnosed until computed tomographic (CT) scans were performed (1). The third case was a serendipitous finding. The abnormal findings on CT led to angiography, which confirmed the CT findings in all cases. The CT appearance in those cases was diagnostic, whereas the changes on urography were minimal, if any. We believe that angiography and surgery may be obviated when cases exhibit these characteristic findings on CT.