title: Second primary cancers in the lung in head and neck cancer patients: a challenge.
mesh_terms: D006258:Head and Neck Neoplasms / Q000453:epidemiology*; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology*; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology*; D012306:Risk