鼻咽癌(NPC)是头颈部最常见的恶性肿瘤,在我国南方地区发病率较高,放射治疗是目前临床上治疗NPC的最佳方法[1],但放射治疗后常并发分泌性中耳炎(SOM),临床表现为耳闷、耳鸣、听力下降,严重者耳失聪等,严重影响了NPC患者放射治疗后的生活质量,因此,积极有效地预防放射治疗后 Nasopharyngeal carcinoma (NPC) is the most common malignant tumor of the head and neck. It has a high incidence in the southern part of our country. Radiation therapy is the best method for the treatment of NPC in clinic at present [1]. However, the common secretory otitis media (SOM), clinical manifestations of the ear boredom, tinnitus, hearing loss, severe hearing loss and so on, seriously affecting the quality of life of NPC patients after radiotherapy, therefore, active and effective prevention of radiation therapy