We report a case of segmental renal infarction due to a traumatic diss
ecting hematoma of a renal artery branch. Some features of the cross-s
ectional imaging studies were atypical of infarct and suggestive of tu
mor. Renal arteriography demonstrated aneurysmal dilatation of an appr
oximately 3-cm portion of a segmental renal artery, an uncommon but hi
ghly suggestive finding of traumatic arteriopathy.