Azygos Vein

The azygos vein is a vertically oriented unpaired vein traversing the right side of the thoracic vertebral column. It transports deoxygenated blood from the posterior walls of the thorax and abdomen to the superior vena cava.

Case #1a. Azygos vein seen to the right of the aorta.
 



Case #1b. Azygos vein seen feeding into superior vena cava.