[Multiple primary malignant neoplasms of the head and neck].
D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology; D004938:Esophageal Neoplasms / Q000453:epidemiology*; D005260:Female; D006258:Head and Neck Neoplasms / Q000453:epidemiology*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000453:epidemiology*; D012509:Sarcoma / Q000453:epidemiology; D013274:Stomach Neoplasms / Q000453:epidemiology*