鼻咽癌有很多分化类型,常见于咽隐窝,位于咽鼓管咽口内侧角的后内侧壁。这种恶性肿瘤在大多数国家发病率较低,不到1/10万人。但在中国南部,非洲北部和阿拉斯加州,其发病率却很高,尤其多见于阿拉斯加州的因纽特人和中国广东人。有报道在香港鼻咽癌的发病率男女各为20～30/10万和 Nasopharyngeal carcinoma has many types of differentiation, common in the pharyngeal recess, located in the medial wall of the medial corner of the eustachian tube pharyngeal mouth. The incidence of this malignancy in most countries is low, less than 1 in 10 million. However, in southern China, northern Africa and Alaska, the incidence is high, especially among Inuit Alaskans and Chinese Cantonese. It has been reported that the incidence of nasopharyngeal cancer in Hong Kong each male and female 20 to 30 / 100,000 and