PMC5396052_01
Axial images of the venous phase of CT renal angiography showing two left renal veins draining into the IVC with retro-aortic course
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F1
In CT renal angiography, the dual renal veins were found on the left side with both of them coursing in retro-aortic location instead of normal pre-aortic location (Fig 1).
Coronal reformatted image of the venous phase of CT renal angiography showing two retro-aortic left renal vein with drainage into the IVC as well as the left common Iliac vein
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F2
One of the two left renal veins coursed oblique and drained into the lateral part of IVC; the other left renal vein coursed parallelly with the above-mentioned vein up to short length and then coursed downwards to drain into the left common iliac vein (Fig 2).
VRT image of retro-aortic left renal vein with drainage into the IVC as well as the left common iliac vein
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F3
Volume rendering technique reformation in CT scan also confirmed the drainage of both left retro-aortic renal veins (Fig 3).