[Multiple cancer involving the head and neck region--a statistical study of the sites and frequencies].
D005260:Female; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology; D006258:Head and Neck Neoplasms / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology* / Q000209:etiology