Incidental note of a circumaortic left renal vein, crosses the midline. definition please?

Anatomical variant: Normally, the left renal vein crosses over the aorta and drains into the vena cava. A circum-aortic left renal vein is simply a vein that crosses both above and behind the aorta. It's not a problem in the least and could only cause a vascular surgeon an issue in an open aortic operation if he wasn't aware of it. So no problem! you can still call the hogs! wps!