title: Intratracheal thymus: a rare cause of airway obstruction.
mesh_terms: D000402:Airway Obstruction / Q000209:etiology*; D002828:Choristoma / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007223:Infant; D011859:Radiography; D013950:Thymus Gland; D014134:Tracheal Neoplasms / Q000150:complications / Q000000981:diagnostic imaging*