Figure 12. Transplanted kidney infarction in a 71-year-old man who presented with renal dysfunction and hypertension. The patient had undergone transplantation 4 months earlier. Source MR angiogram demonstrates multiple peripheral wedge-shaped perfusion defects representing multifocal infarcts (arrow). Subsequent MR angiograms (not shown) demonstrated that the renal artery was widely patent. The cause of the infarcts was not determined.