最近,在鼻咽癌病因学的研究中,注意到了某些外界因素的影响,可供我们进行防治工作和进一步开展研究工作的参考。外源性致癌因素一、某些致癌化学物质的吸入:数十年前,已有人怀疑到屋舍通风不畅或无适宜烟囱,长期吸入燃料(稻草、木柴)的炊烟、烛 Recently, in the study of the etiology of nasopharyngeal carcinoma, we have noticed the influence of certain external factors, which can be used as reference for our prevention and control work and further research work. Exogenous carcinogenic factors 1. Inhalation of certain carcinogenic chemicals: Dozens of years ago, people suspected that the ventilation of the house was poor or there was no suitable chimney, and long-term inhalation of fuel (straw, firewood), smoke, candles