title: Preoperative irradiation in head and neck cancer.
mesh_terms: D006258:Head and Neck Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D007822:Laryngeal Neoplasms / Q000532:radiotherapy; D009062:Mouth Neoplasms / Q000532:radiotherapy; D009362:Neoplasm Metastasis; D010255:Paranasal Sinus Neoplasms / Q000532:radiotherapy; D010610:Pharyngeal Neoplasms / Q000532:radiotherapy; D011878:Radiotherapy / Q000009:adverse effects; D011879:Radiotherapy Dosage; D012468:Salivary Gland Neoplasms / Q000532:radiotherapy