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Left superior posterior thoracic wall showing neurovascular relationship in 2nd and 3rd ICS. The order of neurovascular bundle at the 2nd ICS (nerve, artery, vein) and 3rd ICS (artery, vein, nerve) from superior to inferior. Numbers 1-5: ICS number; HICA: highest intercostal artery; 1st CT: first common trunk; N: nerve; V: vein; A: artery.
