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Figure 4.  Bronchial dehiscence in a patient with a right lung transplant for ₁-antitrypsin deficiency. Axial chest CT image, obtained more than 4 weeks after lung transplantation, shows a crescent of air outside the airway (black arrow), medial to the right main bronchus. This finding was due to an anastomotic leak. A small pneumothorax (white arrow) represents a bronchopleural fistula.