pneumothorax
Medical term for a collapsed lung caused by air in the pleural space. Related to 気胸 (pneumothorax), with 肺 specifying the lung.
See also: 気胸
Chest drainage is often performed to treat pneumothorax.
Compound of 肺 (lung) and 気胸 (pneumothorax). The exact historical derivation is uncertain, but the term is a straightforward medical compound.