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放射治疗是鼻咽癌的标准治疗方法,但由于大多数患者确诊时已属局部晚期或晚期,这类患者单纯放疗后的5年总生存率为59%～75%。远处转移和局部复发是局部晚期鼻咽癌(Ⅲ-Ⅳa期)治疗失败的主要原因。尽管近年来放疗设备更新,照射技术进步,但放射治疗是一种局部治疗方法,不能预防远处转移。由于绝大多数鼻咽癌对放射治疗及化学治疗均较敏感,因此对鼻咽癌化学治疗的研究
Radiation therapy is the standard treatment for nasopharyngeal cancer. However, since the majority of patients are already diagnosed locally advanced or advanced, the 5-year overall survival after radiotherapy alone is 59% -75%. Remote metastasis and local recurrence are the main reasons for the failure of locally advanced nasopharyngeal carcinoma (stage Ⅲ-Ⅳa). Despite recent advances in radiotherapy equipment and advances in irradiation technology, radiation therapy is a local treatment and can not prevent distant metastases. Due to the vast majority of nasopharyngeal carcinoma on radiotherapy and chemotherapy are more sensitive to the chemotherapy of nasopharyngeal carcinoma