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在世界大多数地区,鼻咽癌(NPC)是一种罕见的恶性肿瘤,年令标化发病率低于1/10万。在少数已知的相对高发区中,中国南方发病率最高,这些人居住在以广东省为中心的地区,讲广东方言,其男性发病率可达30—50/10万。目前,确切的流行病学和实验证据表明摄取咸鱼和某些腌清食物是中国人中易患NPC的一个重要因素。一些非饮食性环境接触,即各种各样可吸入性物质亦曾被认为是NPC的危险因素,如尘埃、烟尘及化学烟雾,燃烧柴草木柴及香所产生的烟,主动吸烟和被动吸烟,使用中国的鼻腔油剂、
In most parts of the world, nasopharyngeal carcinoma (NPC) is a rare malignancy with an annualized prevalence of less than 1 in 100,000. Among the few known relatively high incidence areas, the incidence rate is highest in southern China. These people live in areas centered on Guangdong Province and speak Guangdong dialect. The male incidence rate is 30-50 per 100,000. At present, definitive epidemiological and experimental evidence indicates that ingesting salted fish and certain pickled foods is an important factor for Chinese people susceptible to NPC. Some non-eating environmental exposures, i.e., a variety of inhalable substances have also been considered as risk factors for NPCs, such as dust, smoke and chemical smog, burning firewood, incense smoke, active smoking and passive smoking, Use Chinese nasal oil,