[Nutcracker phenomenon treated with left renal vein transposition: a case report].

Herein is reported a case of the nutcracker phenomenon with severe gross hematuria which was surgically treated. A 14-year-old boy had been suffering from left flank pain and recurrent gross hematuria causing urinary retention with blood clots. Radiological images including three-dimensional computed tomography (CT) and angiography disclosed the nutcracker phenomenon with left renal venous hypertension. Since the aforementioned symptoms could not be managed conservatively, he underwent transposition of the left renal vein at 5.5 cm caudal from the original position. Postoperative course was uneventful and the patient has had no further hematuria after the surgery.