Cervical lymph node metastases in patients with squamous cell carcinoma of the maxillary antrum: the role of elective irradiation of the clinically negative neck.
D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy / Q000556:secondary*; D005260:Female; D006258:Head and Neck Neoplasms / Q000532:radiotherapy / Q000556:secondary*; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008441:Maxillary Neoplasms / Q000532:radiotherapy; D008875:Middle Aged; D012306:Risk