Figure 8

64-year-old man with tracheobronchomalacia complaining of chronic cough, exertional dyspnea and wheezing. Inspiratory axial CT scan through upper lobes shows normal trachea and lung (a). Expiratory axial CT scan demonstrates collapse of trachea due to tracheobronchomalacia as well as extensive air-trapping (b). On axial expiratory CT scan at subcarinal level collapse of the intermediate (arrowhead) and lower lobar (arrow) bronchi due to bronchomalacia can be seen (c). Note extensive air-trapping of the lower lobes.