Fig. 14. A 51-year-old woman with an adenoid cystic carcinoma.

A. Abrupt luminal obliteration of the left central airway (arrow) is seen on chest radiograph, which is associated with atelectasis of the left lingular division and left lower lobe and ipsilateral mediastinal shifting. Axial contrast-enhanced chest CT shows diffuse continuous and circumferential wall thickening with luminal narrowing of the left central bronchi and left hilar lymphadenopathy.

B. Bronchoscopy reveals endobronchial protruding masses with hypervascularity.