title: Pneumomediastinum resulting from performing Valsalva maneuvers during marihuana smoking.
mesh_terms: D000328:Adult; D002188:Cannabis; D006801:Humans; D008297:Male; D008478:Mediastinal Emphysema / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography; D019966:Substance-Related Disorders / Q000150:complications*; D014636:Valsalva Maneuver / Q000009:adverse effects*