title: Extra-tracheal air.
authors.forename: Hsiang-Ling
authors.initials: HL
authors.lastname: Chen
authors.forename: Te-Chun
authors.initials: TC
authors.lastname: Shen
authors.forename: Chih-Yen
authors.initials: CY
authors.lastname: Tu
mesh_terms: D000293:Adolescent; D006801:Humans; D008297:Male; D008478:Mediastinal Emphysema / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011379:Prognosis; D014057:Tomography, X-Ray Computed