The point of stenosis was located at 1/3 of the trachea (79.1%); the diameter of stenosis segmentwas 3.2 ± 0.75 mm, the length of stenosiswas 28.2 ± 12.6 mm on CT-Scan. Through bronchoscopy, The point of stenosis was located at 1/3 of the trachea (65.3%), the diameter of stenosis was 3.2 ± 1.5 mm, the length ofnarrow segmentwas 33.2 mm ± 3.9 mm.