The following factors are currently recognized as the causes of lung cancer

Experts remind that early detection and early treatment of lung cancer are the fundamentals of maintaining health. So what are the causes of lung cancer? I hope the following experts' introduction can help you. Let everyone know more about the causes of lung cancer .

1. Smoking is one of the causes of lung cancer. According to a large number of survey data from various countries, the cause of lung cancer is closely related to smoking. The increase in the incidence of lung cancer is parallel to the increase in cigarette sales. Cigarettes contain many carcinogens such as benzopyrene. Experimental animals that inhale cigarette smoke or apply tar can induce respiratory and skin cancer. The incidence of lung cancer in smokers is 10 times higher than that of non-smokers, and the incidence of heavy smokers is 20 times higher than that of non-smokers. At the end of this century, with the increasing number of female smokers in Western European countries, the incidence of lung cancer in female patients has also increased significantly. Among the clinically diagnosed lung cancer cases, those who smoke more than 20 cigarettes a day for more than 30 years account for more than 80%.

2. Air pollution. The incidence of lung cancer is high in industrially developed countries, higher in cities than in rural areas, and higher in factory and mining areas than in residential areas. The main reason is that in industrially and traffic-developed areas, the atmosphere is polluted by harmful substances such as benzopyrene carcinogenic hydrocarbons produced by the combustion of oil, coal, internal combustion engines, and asphalt road dust. Survey materials show that the incidence of lung cancer is also increased in areas with high concentrations of benzopyrene in the atmosphere. Air pollution and smoking may promote each other and play a synergistic role in the incidence of lung cancer.

3. Occupational factors. In the 1930s, there were reports in the literature that the incidence of lung cancer was high in the SchneebergS mining area in Europe. After years of investigation and research, it is now recognized that long-term exposure to radioactive substances such as uranium and radium and their derivatives, carcinogenic hydrocarbons, arsenic, chromium, nickel, copper, tin, iron, coal tar, asphalt, petroleum, asbestos, mustard gas and other substances can induce lung cancer, mainly squamous cell carcinoma and undifferentiated small cell carcinoma, which is the cause of lung cancer.

4. Chronic lung diseases. Tuberculosis, silicosis, pneumoconiosis, etc. can coexist with lung cancer. The incidence of cancer in some cases is higher than that of normal people. In addition, chronic inflammation of the lung bronchus and pulmonary fibrosis scar lesions may cause squamous metaplasia or hyperplasia during the healing process. On this basis, some cases may develop into cancer, which is also the cause of lung cancer.

5. Internal factors of the human body. Other causes of lung cancer include family inheritance, reduced immune function, metabolic activity, endocrine dysfunction, etc., which may also play a certain role in promoting the occurrence of lung cancer.

The above content is the causes of lung cancer introduced by experts. Please pay attention to it. I hope it will be helpful to you. If you have other questions about the causes of lung cancer, please consult online experts and they will give you detailed answers.