I am often asked by patients/families, how long can I live with lung cancer? Whenever I am asked this question, I will tell him very firmly that we have ways to keep you alive for a long time. It is not that lung cancer and death are equal, about 80% of patients can survive for more than 5 years after surgery for early stage lung cancer; for patients with inoperable middle and late stage, more than half of them can live more than 2-3 years after comprehensive treatment. Because new technology and new drugs keep appearing, there is hope as long as one lives. In terms of prevention, the highest incidence of tumor is lung cancer, and the highest mortality rate is also lung cancer, but we should not “talk about cancer”, tumor can be prevented, to prevent, first of all, we should talk about the cause of the disease, how to get it. So far, the number one culprit of lung cancer is still smoking, such as the United States, which believes that 90% of lung cancer patients are caused by smoking, our domestic data is not as high, but at least 60%, or even 70% of lung cancer is caused by smoking, our country is a major producer of tobacco, but also the number one consumer country. We strongly appeal to the government to pay attention to tobacco control, and hope that the public actively participate in tobacco control, I lived and studied in MD Anderson Cancer Center in the United States for more than a year, the United States is really doing better than us in this regard; in addition, in recent years, automobile exhaust and air pollution also play a very important role in the increase of lung cancer incidence. In addition, the Chinese diet requires frying, especially oil smoke, which also plays an important negative role in the incidence of lung cancer. There are also some chronic lung infections, such as tuberculosis, which are also correlated with lung cancer and should be actively controlled. II How to diagnose lung cancer? If a person with a normal job has a cough in the past few days, and there is no change in life and work, but suddenly there are respiratory symptoms, it is indeed necessary to be alert. Do a chest CT directly to see, as chest X-ray is not very reliable and its accuracy is poor. For a screening test, you should also have a low-dose spiral CT, and if necessary, you may need a bronchoscopy/ultrasound/tumor markers and sometimes a puncture biopsy to make a clear diagnosis. If I smoke 20 cigarettes a day for 20 years, this multiplier will be 400, which is a risk factor, if I smoke 40 cigarettes a day, I will reach this risk index in 10 years. I especially recommend at least twice a year to do a physical examination and a chest CT to look at. Some patients often ask, “Am I in early or late stage? The first factor is the lung tumor itself, that is, there is a lesion in the lung, and the staging is based on different sizes. The second factor is the condition of local lymph nodes, and the third factor is whether there is any spread, that is, whether there is metastasis. After examining these three aspects and putting this data together, each stage has a criterion to determine stage 1, stage 2, stage 3 and stage 4. Some netizens say, “I may be very busy and don’t have time to do medical checkups, is there any way to self-test lung cancer? Because there are many cancers like lymphoma and breast cancer that can be detected by self-examination? Unfortunately, because the lung is not a surface organ, it is inside the thorax, the chest wall is very thick and there are ribs, so we can’t touch it with our hands. Early treatment will improve the cure rate, and problems must be seen in a specialist hospital, which may be better. Expert Profile: Wang Qiming, Deputy Director of Department of Internal Medicine, Zhengzhou University Cancer Hospital/ Henan Cancer Hospital, Director of Respiratory Medicine Ward 3, Chief Physician, MD, Postdoctoral Fellow, Anderson Cancer Center (MDACC), USA. He is a member of AACR, a member of chemotherapy committee of Henan Provincial Anti-Cancer Association, a member of lung cancer committee of Henan Provincial Anti-Cancer Association, and a member of the Department of Respiratory Medicine of Henan Cancer Hospital. He is a member of the Committee of Chemotherapy of Henan Provincial Cancer Association, a member of the Committee of Head and Neck Tumor of Henan Provincial Cancer Association, a member of the Committee of Biotherapy of Henan Provincial Cancer Association, a member of the Committee of Tumor Epidemiology and Etiology of Henan Provincial Cancer Association, a member of the Committee of Clinical Epidemiology and Evidence-based Medicine of Henan Medical Association. Specialties: pathogenesis and individualized treatment of thoracic tumors (esophageal cancer, lung cancer), tumor stem cells and chemoradiotherapy resistance. He has rich clinical experience in diagnosis and treatment of lung cancer, participated in writing one professional book on tumor, won one provincial scientific research achievement, two departmental level, applied for four provincial scientific research projects, published more than 30 national papers, including more than 20 core journals.