Fig. 3

A 46-year-old male patient with esophageal cancer and esophageal stent implantation, with the tumor compressing the airway. (A: The airway near the tracheal prominence is compressed and significantly narrowed. B: After placement of the tracheal stent, the narrowing is relieved. C: Mucosal congestion and bleeding. D: Airway bleeding during the stent placement process. The arrow points to the airway and congested mucosa.)