title: Pneumomediastinography: techniques for studying intrathoracic lymphadenitis.
mesh_terms: D001984:Bronchial Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging; D008199:Lymphadenitis / Q000000981:diagnostic imaging*; D008207:Lymphatic Metastasis; D008722:Methods; D011012:Pneumomediastinum, Diagnostic; D013902:Radiography, Thoracic