Abdominal CT scan showing an inferior vena cava located on the left side of the aorta (arrow).
CT-scan shows a left renal vein (thick arrow) crossing posterior to the aorta to join superiorly the right renal vein (thin arrow). The ureteral stent is also evident on the left side (open arrow).
CT scan showing the left renal vein crossing posterior to the calcified aorta (arrow).
CT scan showing both renal arteries posterior to the aorta (arrows).
CT scan obtained at the level of the diaphragmatic crus. The vessel parallel to the aorta is the azygos vein (arrow).
CT scan obtained at an upper level, showing an enlarged azygos vein (arrow).