Prophylactic irradiation in head and neck cancer.
D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000517:prevention & control / Q000532:radiotherapy; D006258:Head and Neck Neoplasms / Q000517:prevention & control* / Q000532:radiotherapy; D006801:Humans; D008875:Middle Aged; D009333:Neck / Q000528:radiation effects*; D009362:Neoplasm Metastasis