<unk>  is a medical condition where air enters the pericardial cavity. This condition has been recognized in preterm neonates, in which it is associated with severe lung pathology, after vigorous resuscitation, or in the presence of assisted ventilation. This is a serious complication, which if untreated may lead to cardiac tamponade and death. Pneumomediastinum, which is the presence of air in the mediastinum, may mimic and also coexist with<unk> . It can be congenital, or introduced by a wound.
Pneumopericardium
Hemopericardium
Urinothorax
Chylothorax
Fibrothorax
Hemothorax
Pneumomediastinum
Pneumothorax