Lung cancer is the most common malignant tumor, and its incidence and mortality rate are on the rise in all countries in the world, with the highest incidence in medium and large cities, and the highest incidence in Zhengzhou and cities near mining areas in our province. A serious reality is that the early detection rate of lung cancer is still low, and more than 80% of the patients clinically diagnosed with lung cancer are middle and late stage cases. The incidence rate of lung cancer is about 50/100,000, and the five-year survival rate is only about 10-15%. “Bronchial lung cancer has become a serious public health problem that threatens human health and deserves the attention of the whole society. 1.What is lung cancer? Lung cancer is a malignant tumor formed by the mutation of bronchial epithelial cells or bronchial gland cells leading to uncontrolled overproliferation, which is divided into central lung cancer and peripheral lung cancer. According to the pathological types, lung cancer can be divided into squamous carcinoma, adenocarcinoma, small cell undifferentiated carcinoma and large cell carcinoma, among which squamous carcinoma and small cell carcinoma are mostly central lung cancer, which is closely related to smoking; adenocarcinoma mostly occurs in women, which is not closely related to smoking. 2.What are the symptoms of lung cancer? Lung cancer mainly manifests as cough, sputum and blood, chest tightness, chest pain and wasting, etc. In some cases, fever and coughing sputum may appear. If tumor tissues press adjacent tissues and organs, hoarseness, difficulty in breathing, difficulty in swallowing and superior vena cava obstruction syndrome may appear. Some cases may be complicated by pleural effusion, obstructive pneumonia, obstructive atelectasis and restrictive emphysema, which further complicate the condition. 3.Is there any relationship between smoking and lung cancer? It is an indisputable fact that the chance of lung cancer among smokers is significantly greater than that of non-smokers. Tobacco tar contains 3,4 benzpyrene, which is a carcinogenic substance. The earlier you smoke, the longer you smoke, and the more risk factors you have for developing lung cancer. Some people say that smokers pay a lot of taxes every year, which is a great contribution to the country. This is far from true, as tobacco-related fires cost the entire tax bill each year, not including the cost of medical care for smoking-related illnesses. For your health and the health of your family and others, we recommend: ① it is best not to smoke; ② to quit smoking in public places; ③ to smoke less and minimize the harm to others. Smoking is harmful and not beneficial. Start from me, start from now. 4.Is lung cancer contagious or hereditary? Lung cancer is not caused by bacteria or other microorganisms, and there is no direct pathogen, so it is not contagious and does not require hospital isolation. Lung cancer is caused by excessive proliferation of bronchial or alveolar epithelial cells, followed by mutation and finally cancer. In some cases, there is a certain degree of family clustering in the development of lung cancer. Unlike genetic diseases, there is no dominant or non-dominant inheritance rule for lung cancer. Therefore, the “heredity” of lung cancer is a potential possibility, not a certainty. Therefore, even if someone in the family has had lung cancer, there is no need for others to be overly nervous. 5.How can lung cancer be detected early? (1) Conduct mass lung cancer screening, at least once a year. For those who are older than 40 years old and have smoked more than 400 cigarettes per year, they should be screened once every 6 months. (2) Early symptoms, which are easily confused with general tuberculosis, such as persistent cough for more than 3 weeks, sputum with blood (especially blood sputum) and unexplained chest pain, should be promptly seen by a specialized hospital. 6.How to reasonably apply modern examination techniques to detect early lung cancer? Currently, there are three commonly used examination methods: ① Fibrinoscopy or sputum exfoliative cell examination is simple and easy to perform, and can be used repeatedly. ②Imaging examination, including chest X-ray, CT, MRI and PET-CT, etc. ③Tumor marker examination. 7.What are the modern treatments for lung cancer? The treatment means of lung cancer mainly include the following: surgery, chemotherapy, radiotherapy and biological treatment. Early diagnosis and comprehensive treatment are the keys to improve the cure rate of lung cancer. Specialists formulate programmed and individualized comprehensive treatment plans according to different patients’ lesion sites, lesion size, scope and histological pathological types, as well as patients’ general conditions, so that more effective measures can be taken and the adverse effects of surgery, chemotherapy and radiotherapy on patients can be minimized.