title: Nitrous oxide abuse: a new cause of pneumomediastinum.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008478:Mediastinal Emphysema / Q000139:chemically induced* / Q000000981:diagnostic imaging; D009609:Nitrous Oxide; D011859:Radiography; D019966:Substance-Related Disorders / Q000150:complications*
chemical_list: D009609:Nitrous Oxide