Pneumothorax Radiology Masterclass. Pneumothoraces) refers to the presence of gas (often air) in the pleural space. Hydropneumothoraces) (or less commonly pneumohydrothorax (plural:
This ct image (coronal plane) shows the severity of the bullous disease. The other cystic lungdisease which causes pneumothorax is langerhans cell histiocytosis (lch).