<P> The brachiocephalic veins are the major veins returning blood to the superior vena cava . </P> <P> The brachiocephalic vein is formed by the confluence of the subclavian and internal jugular veins . In addition it receives drainage from: </P> <Ul> <Li> Left and right internal thoracic vein (Also called internal mammary veins): drain into the inferior border of their corresponding vein </Li> <Li> Left and right inferior thyroid veins: drain into the superior aspect of their corresponding veins near the confluence </Li> <Li> Left superior intercostal vein: drains into the left brachiocephalic vein </Li> </Ul> <Li> Left and right internal thoracic vein (Also called internal mammary veins): drain into the inferior border of their corresponding vein </Li>

Major veins that drain into the brachiocephalic veins