text: <unk>  is a medical condition where air enters the pericardial cavity and a well-recognized clinical and radiologic entity.  It can be congenital, or introduced by a wound.
option_0: Pneumopericardium
option_1: Hemopericardium
option_2: Urinothorax
option_3: Chylothorax
option_4: Trapped lung
option_5: Hemothorax
option_6: Pneumomediastinum
option_7: Pneumothorax