What is Pneumothorax?

Air in the pleural captivity, which enters via a wound in the chest wall or lung. When this happens, the lung collapses, but if the air is absorbed from the pleural cavity the lung reinflates.

CT scan of the chest showing a pneumothorax on the patient's left side (right side on the image). A chest tube is in place (small black mark on the right side of the image), the air-filled pleural cavity (black) and ribs (white) can be seen. The heart can be seen in the center.