title: Diagnostic pneumomediastinography.
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D008722:Methods; D009157:Myasthenia Gravis / Q000150:complications*; D011012:Pneumomediastinum, Diagnostic; D011859:Radiography; D013945:Thymoma / Q000150:complications / Q000000981:diagnostic imaging*; D013953:Thymus Neoplasms / Q000150:complications