hemiazygous vein
HEMIAZYGOYS VEIN:
It is called INFERIOR AZYGOUS VEIN because it is the mirror image of the lower part of the azygous vein.
formation:
it is either from the left renal vein or by the union of left ascending lumbar and left subclavian vein
. It pierces the left crus of the diaphragm and passes left to the vertebra. Crosses to the opposite side at the level of eigth thoracic vertebra by passing behind aorta and oesophagus and drains into azygous vein.
Tributaries:
1. Left Ascending Lumbar Vein
2. Left Subcostal Vein
3. ninth to eleventh posterior intercostal vein.
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