title: Malignant tumor of the trachea.
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004724:Endoscopy; D006801:Humans; D007829:Laryngostenosis / Q000209:etiology; D008297:Male; D008875:Middle Aged; D012907:Smoking; D014132:Trachea / Q000473:pathology; D014134:Tracheal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery