title: Malignant tumors of the major salivary glands.
mesh_terms: D002277:Carcinoma / Q000532:radiotherapy*; D005500:Follow-Up Studies; D006258:Head and Neck Neoplasms; D006801:Humans; D009362:Neoplasm Metastasis / Q000532:radiotherapy; D009364:Neoplasm Recurrence, Local; D010307:Parotid Neoplasms / Q000532:radiotherapy*; D011879:Radiotherapy Dosage; D012468:Salivary Gland Neoplasms / Q000532:radiotherapy*; D013997:Time Factors