At the level of the origin of the left subclavian artery, a soft tissue mass is seen to the left of the subclavian artery.
Level of the left auricle, a large vessel is seen beside the descending aorta.
At the level of kidneys: presence of a left inferior vena cava (IVC). The right renal vein is reaching the left IVC.
On phlebography of the mediastinum by injection of contrast material in the left iliac vein there is a large vessel at the left border of the heart which enters the left brachiocephalic vein.
Left inferior vena cava (1), azygos continuation of the left inferior vena cava (2).
Superior intercostal vein (1), left azygos vein (2), right azygos vein (3), left brachiocephalic vein (4).