Definition of Pneumomediastinum
Pneumomediastinum: Free air in the space between the lungs (mediastinum), which may give rise to pneumothorax or pneumopericardium and compromise the lungs or heart.
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Pneumomediastinum: Free air in the space between the lungs (mediastinum), which may give rise to pneumothorax or pneumopericardium and compromise the lungs or heart.