case_images: PMC5296954_01
case_images: Flow-volume curve during forced maneuvers. The plateau of both the inspiratory and expiratory phases shown during forced maneuvers is suggestive of fixed central or upper airway obstruction
case_images: 12948_2017_60_Fig1_HTML.jpg
case_images: PMC5296954_01_12948_2017_60_Fig1_HTML.jpg
case_images: Fig1
case_images: Forced-expiratory volume in one second (FEV1) was 2.03 L (83% of the predicted value), forced vital capacity (FVC) was 2.89 L (101% of the predicted value) and FEV1/FVC ratio was 0.70, 89% of the predicted value (Fig. 1). 
case_images: Inspective bronchoscopy revealing a subglottic tracheal stenosis
case_images: 12948_2017_60_Fig2_HTML.jpg
case_images: PMC5296954_01_12948_2017_60_Fig2_HTML.jpg
case_images: Fig2
case_images: The patient was further evaluated with flexible bronchoscopy, which confirmed a subglottic tracheal stenosis extended for 15 mm with an internal diameter of 6 mm (Fig. 2).
case_images: Rigid bronchoscopy showing the upper tracheal circumferential stenosis. a Before procedure and b restored patency immediately after the procedure
case_images: 12948_2017_60_Fig3_HTML.jpg
case_images: PMC5296954_01_12948_2017_60_Fig3_HTML.jpg
case_images: Fig3
case_images: The patient underwent rigid bronchoscopy with mucosal biopsies, mechanical dilatation laser-assisted (diode laser) and balloon to correct the stenosis, which reached an internal diameter of 13 mm after the procedure (Fig. 3).