Fig. 5From: Primary ectopic substernal thyroid cancer with trachea relapse: a case report and opinions of management a Before stenting, the neoplasm narrowed nearly 70 % of the lower trachea. b After stenting, the airway was reconstructed for free respiration. c Before stenting, the neoplasm narrowed nearly 75 % of the airway at the second time just above the trachea carina. d After stenting, the airway was reconstructed for the second timeBack to article page