Anatom3DAccessory hemiazygos vein
Vena hemiazygos accessoria · Přídatná polodvojná žíla
Veins
Looks like
A vein on the left side of the mid-thoracic spine, crossing to the right to join the azygos vein.
What it does
Drains the upper left rib spaces (about 4th to 8th) and the left bronchial veins.
Keeping it well
Widens as a detour route if the superior or inferior vena cava is blocked.