目前,已从煤中鉴定出各种致癌物质,如苯芘、苯蒽衍生物。同时烟中还含无机性致癌物,如砷、镉和铬。因此,有人已假定普通煤尘是一种致癌危险因素。矿工吸入的煤尘,由于肺清除系统作用,使支气管粘液移向咽部,然后被吞下而进入胃肠道内。为了调查煤工胃癌的危险,作者对荷兰南部一个煤矿区进行了 Currently, a variety of carcinogens have been identified from coal, such as benzene pyrene, benzene anthracene derivatives. Smoke also contains inorganic carcinogens, such as arsenic, cadmium and chromium. Therefore, it has been assumed that ordinary coal dust is a carcinogenic risk factor. Miners inhaled coal dust, due to lung clearance system, so that bronchial mucus moved to the throat, and then swallowed into the gastrointestinal tract. To investigate the danger of coal workers’ stomach cancer, the authors conducted a coal mining area in the south of the Netherlands