ICU Chest Films > Air in the Chest > Pneumothorax > Subpulmonary Pneumothorax

Subpulmonary Pneumothorax

Occasionally, a posterior subpulmonary pneumothorax will result in visualization of the more superior anterior diaphragmatic surface and the inferior posterior diaphragmatic surface, resulting in the double-diaphragm sign.

Air accumulates inferior to the lung base in this case of subpulmonic pneumothorax