Posterior intercostal veins
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The posterior intercostal veins are veins that drain the intercostal spaces posteriorly. They run with their corresponding posterior intercostal artery on the underside of the rib, the vein superior to the artery.
There are eleven posterior intercostal veins on each side. Their patterns are variable, but they are commonly arranged as:
- The 1st posterior intercostal vein, supreme intercostal vein, drains into the brachiocephalic vein or the vertebral vein.
- The 2nd and 3rd (and often 4th) posterior intercostal veins drain into the superior intercostal vein.
- The remaining posterior intercostal veins drain into the azygos vein on the right, or the hemiazygos vein on the left.
- Template:NormanAnatomy (Template:NormanAnatomyFig)
- Template:SUNYAnatomyLabs - "Mediastinum: The Sympathetic Ganglion and Sympathetic Trunk"