What are the main factors that cause lung cancer?

Clinically, lung cancer is a common malignant tumor of the lungs. Most lung cancers originate from the bronchial mucosal epithelium. Many people suffer from lung cancer to varying degrees. So, what causes lung cancer? Let's take a look at the main causes of lung cancer .

1. Smoking. 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 a variety of 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. The incidence of lung cancer in heavy smokers is even higher, 20 times higher than that of non-smokers.

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 combustion of oil, coal, internal combustion engines, and asphalt road dust produces harmful substances such as benzopyrene carcinogenic hydrocarbons that pollute the atmosphere. Therefore, this is also one of the causes of lung cancer. Survey materials show that the incidence of lung cancer is also higher 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 also contribute to the occurrence of lung cancer. 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. These are important factors leading to the etiology of lung cancer.

4. Chronic lung diseases such as tuberculosis, silicosis, and pneumoconiosis can coexist with lung cancer. The incidence of these lung cancers is higher than that of normal people. In addition, chronic inflammation of the lung bronchi and pulmonary fibrosis scar lesions may cause squamous metaplasia or hyperplasia during the healing process. On this basis, some lung cancer patients may develop into cancer.

The above is a detailed description of the causes of lung cancer. I hope it can help everyone understand the knowledge of lung cancer in this regard. If you have other questions about lung cancer, you can contact our online experts to answer your questions.

For more information, please visit the lung cancer special topic at http://www..com.cn/zhongliu/fa/ or consult an expert for free. The expert will then give a detailed answer based on the patient's specific situation.