retro aortic left renal vein
Its recognition is important in order to avoid complications during retroperitoneal surgery or interventional procedures .
Retroaortic left renal vein has an estimated prevalence of ~2% .
Urological symptoms can be caused by increased pressure in the renal vein resulting in venous hypertension. This is an atypical form of nutcracker syndrome. Patients can present with hematuria and recurrent left flank pain.
The retroaortic position of the left renal vein has four subtypes :