a) Axial computed tomography (CT) images at the level of the carina.

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a) Axial computed tomography (CT) images at the level of the carina. a) Axial computed tomography (CT) images at the level of the carina. This image shows a nodular lesion in the posterior wall of the left main stem bronchus, which was suspected to be a tumoural lesion. This was confirmed histopahologically. b) Virtual bronchoscopic view of the carina. In the left main stem bronchus, a large polypoid lesion can be visualised, corresponding with the nodular lesion visible on CT scan. With virtual bronchoscopy, this lesion can be passed to evaluate the bronchial tree distal of this tumoral lesion. W. De Wever et al. breathe 2011;7:338-346 ©2011 by European Respiratory Society