Left common carotid artery


  • Second branch of the aortic arch
  • Arises behind manubrium sterni and ascends to a point behind the left sternoclavicular joint
  • Has a short thoracic course in the superior mediastinum

Chief relations in the thoracic portion

  • Left brachiocephalic vein


  • Trachea
  • Recurrent  left laryngeal nerve
  • Oesophagus
  • Thoracic duct


    • Left pleura
    • Left phrenic
    • Vagus nerves
    • Left subclavian artery