[Nutcracker syndrome: Cause of non-glomerular hematuria and massive proteinuria].

Background: Nutcracker syndrome caused by compression of the left renal vein between the aorta and superior mesenteric artery is a non-glomerular cause of left renal bleeding and left varicocele. It has also been recognized to be an important cause of orthostatic proteinuria.

Case Report: A 17-year-old male was evaluated due to recurrent macroscopic hematuria.