title: [Two cases of tracheal abnormality in teenagers presenting as obstructive lung disease].
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging*; D008297:Male; D009379:Neoplasms, Muscle Tissue / Q000000981:diagnostic imaging*; D011859:Radiography; D014132:Trachea / Q000002:abnormalities; D014133:Tracheal Diseases / Q000000981:diagnostic imaging*; D014134:Tracheal Neoplasms / Q000000981:diagnostic imaging*