Tracheal Trunk

The tracheal trunk arises from the caudal pole of the ipsilateral medial retropharyngeal lymph node and runs in or adjacent to the lateral wall of the carotid sheath. The left trunk usually terminates in the thoracic duct, and the right one terminates in the angle formed by the mergence of the right external jugular and the right axillary veins to form the brachiocephalic vein.