Head and neck cancer: preoperative radiation.
D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy* / Q000601:surgery; D006257:Head; D006258:Head and Neck Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy* / Q000601:surgery