[Pneumopericardium following closed chest injury--a report of two cases].
D006801:Humans; D008297:Male; D008875:Middle Aged; D011026:Pneumopericardium / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography; D013898:Thoracic Injuries / Q000150:complications*; D014949:Wounds, Nonpenetrating / Q000150:complications*