Fig. 2
From: Central airway obstruction: is it time to move forward?
A CT scan shows a narrowing in the mid trachea; B Endoscopic vision of subglottic; C endoscopic view of trachea after placement of stent, showing the patency of airway; D Distal view of stent; E, F Stent migration and partially obstructed by mucus. E, F, Courtesy of Dr. José Almeida – Centro Hospitalar de Vila Nova de Gaia, Portugal