What causes lung cancer?

Many friends have such doubts, fearing that they will get lung cancer one day, and may be more depressed if they are pessimistic. So what causes lung cancer? Next, let's learn about the causes of lung cancer together, hoping to help you.

1. Smoking experts have found that continuous smoking and inhalation of dust can stimulate the bronchial epithelium and induce cancer. Tar was applied to the back of rabbits and the incidence of lung cancer was slightly increased. Smoking is currently considered to be the most basic high-risk factor for lung cancer. There are more than 3,000 chemical substances in tobacco, and polycyclic aromatic hydrocarbon compounds (such as benzopyrene) have strong carcinogenic activity. It can act on certain special enzymes in human tissues (especially lung tissues) to produce mutations in cell molecular structures (such as DNA), and there may be mutations in K-ras.

2. Occupational and environmental exposure It is estimated that up to 15% of lung cancer patients have a history of environmental and occupational exposure. There is sufficient evidence to prove that the following 9 industrial ingredients increase the incidence of lung cancer: byproducts of aluminum products, arsenic, asbestos, bis-chloromethylether, chromium compounds, coke ovens, mustard gas, nickel-containing impurities, and vinyl chloride. Long-term exposure to substances such as beryllium, cadmium, silicon, and formalin will also increase the incidence of lung cancer. In addition, air pollution, especially industrial waste gas, is a high-risk factor for lung cancer.

3. Radioactive uranium and fluorite miners are exposed to inert gas radon, decay uranium byproducts, etc., and their incidence of lung cancer is significantly higher than other people, but people exposed to ionizing radiation do not increase the incidence of lung cancer.

4. In patients with chronic lung infections such as tuberculosis and bronchiectasis, the bronchial epithelium may metaplasia into squamous epithelium during the chronic infection process and eventually lead to cancer, but this type of situation is relatively rare.

5. Internal factors Family, genetic and congenital factors, as well as reduced immune function, metabolic and endocrine dysfunction may also be high-risk factors for lung cancer.

6. 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 industrial and transportation developed areas, the atmosphere is polluted by harmful substances such as benzopyrene carcinogenic hydrocarbons produced by the combustion of oil, coal and 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.

The above is the cause of lung cancer that I introduced to you. I hope you will pay attention to it. We must start from the little things in our daily life to prevent the occurrence of cancer. Once you find any abnormal symptoms, you should go to the hospital in time to avoid delaying the disease. If you have other questions, please consult our online doctor for answers. Feihua Health Network wishes you good health!

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