• At the level of T4/ T5/ T6 it inclines towards the left crossing the midline behind the esophagus
  
  
• Lies on the left of the esophagus deep to arch of aorta
  
  
• Terminates by entering the left brachiocephalic vein.
  
  Tributaries
  
  
  
• (+) Posterior mediastinal nodes
  
  
• (+) Small intercostals nodes
  
  
• (+) Left bronchomediastinal trunk
  
  
• (+) Left subclavian trunk
  
  
• (+) Left jugular trunk

Receives all the lymphatics below the diaphragm and the left side above the diaphragm.