Hemiazygos vein is a tributary of which vein?

Question

The Hemiazygos drains the left mediastinum and the left lower esophagus then crosses over to the right side of the body in the thoracic region to drain into which other vein?

Answer 1

The hemiazygos is a tributary of the azygos vein. Crossing over at about T9 vertebral level to bring blood from the left mediastinum and left lower esophagus and dump it into the Azygos which then drains into the the superior vena cava.