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肺癌的发病率在世界范围内呈直线上升趋势,特别在工业发达的国家和大城市,肺癌的发病率和死亡率已高居恶性肿瘤之首。肺癌的发生与大气污染和吸咽密切相关,另外,与厨房内煤烟及油烟浓度过高而通风不良及肺部的慢性炎症刺激均有密切关系。近年来大量调查研究证实,吸烟可导致肺癌的发生,因为香烟在燃烧过程中可产生多种致癌物。肺癌多见于60～70岁有长期吸烟史的人。
The incidence of lung cancer has been on a linear upward trend in the world, especially in industrially developed countries and large cities, the incidence of lung cancer and mortality have been the highest in malignant tumors. The occurrence of lung cancer is closely related to atmospheric pollution and aspiration. In addition, it is closely related to the excessive concentration of soot and fumes in the kitchen, poor ventilation, and chronic inflammation of the lungs. In recent years, a large number of investigations and studies have confirmed that smoking can lead to the occurrence of lung cancer because cigarettes can produce a variety of carcinogens during combustion. Lung cancer is more common in people 60 to 70 years old who have a long history of smoking.