Severe fibrotic changes of the entire right lung associated with volume loss and marked ipsilateral mediastinal shift, with cystic bronchiectasis throughout (signet ring sign).
Massive compensatory hyperinflation of the left upper lobe is observed, with cystic and tractional cylindrical bronchiectasis seen mainly involving the anteromedial basal segment of the left lower lobe and, to a lesser degree, the lingula.
Few atelectatic bands of the left lower lobe.
A small air bubble is seen at the right posterolateral aspect of the trachea at the thoracic inlet level suggestive of a paratracheal air cyst or tracheal diverticulum.
No pleural effusion.
No significant hilar or mediastinal lymphadenopathy.