鼻咽癌是我国常见的恶性肿瘤,较多发生于广东、广西、湖南、江西和福建省,其中广东省是世界最高发地区。早期鼻咽癌放疗5年生存率可达90%～95%;由于鼻咽癌的组织学类型具有区别于其他头颈肿瘤的独特生物学特性:局部侵蚀力强,浸润性扩展,极易侵犯邻近组织器官,区域淋巴结 Nasopharyngeal carcinoma is a common malignant tumor in our country, which occurs more frequently in Guangdong, Guangxi, Hunan, Jiangxi and Fujian Provinces, of which Guangdong is the highest in the world. Early 5-year radiotherapy of nasopharyngeal carcinoma survival rate of up to 90% to 95%; as the histological type of nasopharyngeal carcinoma has a unique biological characteristics that are different from other head and neck tumors: strong local erosion, invasive expansion, easy to violate the neighboring Tissue and organs, regional lymph nodes