title: Respiratory obstruction due to a neoplasm in the lower trachea.
mesh_terms: D000402:Airway Obstruction / Q000209:etiology*; D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D008297:Male; D008875:Middle Aged; D014134:Tracheal Neoplasms / Q000150:complications*