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Editor-In-Chief: C. Michael Gibson, M.S., M.D. 
The intercostal veins are a group of veins which drain the area between the ribs ("costae"), called the intercostal space.
There are three main groups:
- Supreme intercostal vein - 1st intercostal space
- Superior intercostal vein - 2nd, 3rd, and 4th intercostal spaces
- Posterior intercostal veins - all 11, on posterior wall