鼻咽癌是一种上皮起源性的恶性肿瘤,具有明显的地区聚集性,高发于我国南方和东南亚地区,在广东、海南两地发病率最高〔1〕,其病因涉及EB病毒感染、遗传因素、环境因素、饮食因素等。鼻咽癌容易转移,甚至在原发病灶不明显时即发生颈部淋巴结转移或远处器官转移,鼻咽癌转移是鼻咽 Nasopharyngeal carcinoma is a malignant tumor of epithelial origin, with obvious regional aggregation, high incidence in southern China and Southeast Asia, in Guangdong, Hainan, the highest incidence [1], the etiology of Epstein-Barr virus infection, genetic factors , Environmental factors, dietary factors and so on. Nasopharyngeal carcinoma is easy to metastasize, even when the primary lesion is not obvious that occurs when the neck lymph node metastasis or distant organ metastasis, nasopharyngeal carcinoma is nasopharyngeal