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A resident reported the case as 'no residual/recurrent mass lesion'. He was asked to review the case for any abnormal findings? Anything noticeable?
An accessory retro-aortic renal vein is seen apart from anatomically normal renal vein anterior to aorta.
Why would this anomaly be important for surgeon before nephrectomy?
He may clamp the aorta, and while removing the kidney, he may shear off this aberrant vein (unless he knows about it beforehand).
Circumaortic left renal vein crossing behind the aorta and entering the hilum dorsally.