[Renal colic in a young man].

We discuss the case of a young man presenting with "renal colic" whose flank pain however, turned out to be the result of renal infarction due to dissection of an accessory renal artery with fibromuscular dysplasia. The condition was diagnosed after exclusion of nephrolithiasis and work-up of new onset arterial hypertension developing in the later course. He was successfully treated by ethanol ablation (renal ethanol angioinfarction) and coiling of the accessory renal artery with resolution of hypertension in the absence of any antihypertensive medication.