Collapsed lung or pneumothorax is an accumulation of air in the chest causing the lung to separate from the chest wall.
Collapsed lung may also refer to:
Atelectasis, collapse of the air-containing sacs of the lung Collapsed Lung (band), a British hip-hop band
See also
Flail chest, a condition sometimes producing and often confused with pneumothorax Collapsible Lung, an album by Relient K