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鼻咽癌(nasopharyngeal carcinoma,NPC)是我国常见的头颈部恶性肿瘤,在我国南方地区尤为多见。放射治疗是首选方法,但放射治疗后由于电离辐射引起咽鼓管功能障碍,
Nasopharyngeal carcinoma (NPC) is a common malignant tumor of head and neck in our country, especially in South China. Radiation therapy is the preferred method, but radiation therapy eustachian tube dysfunction due to ionizing radiation,