What are the causes of lung cancer? The sooner you know the 5 causes of lung cancer, the better

There are many types of cancer, and lung cancer is a common type of cancer. Lung cancer can seriously endanger the health of patients. In my country, many people suffer from lung cancer every year, so we should pay enough attention to lung cancer. So, let's introduce the causes of lung cancer in detail.

1. Smoking is the direct cause 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.

2. Internal factors: Family, genetic and congenital factors, as well as reduced immune function, metabolic and endocrine dysfunction, are also high-risk factors for the development of lung cancer.

3. 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 combustion of oil, coal, and internal combustion engines, as well as asphalt road dust, produces harmful substances such as benzopyrene carcinogenic hydrocarbons that pollute the atmosphere. This is also the cause of lung cancer.

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

5. 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 components increase the incidence of lung cancer: byproducts of aluminum products, arsenic, asbestos, 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. Therefore, occupation and environment are also the causes of lung cancer.