Intercostal veins

• Anterior intercostal veins
• Posterior intercostal veins
• * Posterior intercost vein that drain into the Supreme intercostal vein - 1st intercostal space
• * Posterior intercost veins that drain into the Superior intercostal vein - 2nd, 3rd, and 4th intercostal spaces. The superior intercostal vein then drains into the Azygous vein.
• * Posterior intercost veins that drain directly into the Azygous vein - in spaces 5-11.
• * Subcostal vein -- below bottom rib and also drains into the Azygous vein.