title: The posterior "nutcracker": hematuria secondary to retroaortic left renal vein.
abstract: Retroaortic left renal vein is an uncommon variant in the renal venous system. Recently a patient with such anomaly presented to us with hematuria.
mesh_terms: D000328:Adult; D006417:Hematuria / Q000209:etiology*; D006801:Humans; D008297:Male; D011859:Radiography; D012082:Renal Veins / Q000002:abnormalities* / Q000000981:diagnostic imaging