International Lung Cancer Awareness Month is celebrated every year in November. As the world’s number one cancer killer, the incidence of lung cancer has been on the rise worldwide in recent years, and this trend is especially evident in China. Here, the public is reminded to stay away from tobacco and areas with severe air pollution to reduce the incidence of lung cancer. People over 40 years old, smoking, family history of tumor and other high-risk groups are recommended to have annual lung cancer screening, but it is difficult to detect early lung cancer by chest X-ray alone, and it is better to choose petct. Since there are no specific symptoms in the early stage of lung cancer and many people do not have regular medical screening, thus when they come to the hospital, the symptoms of lung are more obvious: (1) coughing sputum, hemoptysis or blood in sputum; (2) chest pain, chest tightness, shortness of breath. shortness of breath. The most common symptom of early stage lung cancer is coughing, caused by tumor irritation. However, most lung cancer patients are smokers, so they often mistakenly think that coughing is caused by smoking. Once the tumor invades the small blood vessels in the respiratory tract, blood will flow into the respiratory tract, so blood will be visible in the mucous sputum coughed out, which draws their attention. In addition to these typical symptoms, some lung cancer patients may also suffer from joint pain and headache, which are called “extra-pulmonary symptoms”. Due to the secretion of endosteroid hormones by the tumor, patients show signs of gout. According to statistics, 1/6 of lung cancer patients will have extrapulmonary symptoms. Therefore, we would like to remind you that if you have unexplained headache or joint pain, it is better to ask oncologist for diagnosis as well. Many units give medical checkups to their employees every year, and most of the hospitals that visit them will drive a chest X-ray truck over, which is one of the mandatory items in the unit’s medical checkup. Chest X-ray cannot be used as cancer prevention examination because it is especially easy to miss the diagnosis when doing chest X-ray examination due to the short time. In addition, since there is no photo in chest X-ray, it is totally based on the doctor’s experience, which is very subjective, and it is also difficult for some inexperienced doctors to detect lung abnormalities in such a short period of time. If the cancer in the lung is behind the heart, it cannot be clearly seen by chest X-ray in the anterior-posterior position. At the same time, the result of “no abnormality” in chest X-ray may make people paralyzed and think that “if the test is fine, they will not have lung cancer”. It is recommended that people over 40 years old who smoke or breathe second-hand smoke and have a family history of tumor have a low-dose spiral CT once a year, which has a high resolution and can detect crystals smaller than 4 mm. There are many possibilities of lung shadows: once a lung shadow is found in a physical examination, the first thing a patient suspects is lung cancer. In fact, there are many possibilities if there are shadows in the lungs, such as spherical lesions, which are found in about less than 1/4 of people as lung cancer, and the remaining 3/4 of people may have tuberculosis infection, fungal infection, lung encapsulated cysts, and other assorted diseases. In addition, even in the case of GGO hairy glass-like lesions in the lungs, which appear as faint, irregular patches and are surgically removed, less than 1/3 are lung cancer when pathological examination is done; the vast majority are tuberculosis, inflammatory infections, etc. Once the examination reveals a shadow in the lung, there is no need to be overly nervous. If it is inflammation, the shadow will shrink or dissipate after 2 weeks of standard anti-inflammatory treatment and then go to the hospital for review. If the shadow is found to increase rather than decrease after anti-inflammatory treatment, cancer may be highly suspected and a puncture or PET/CT examination may be performed to confirm the diagnosis. Most patients with shadows in the lungs, only a small percentage of them are cancerous, most of them are benign diseases, therefore, they should be treated correctly and do not need to scare themselves. Beware of the temptation of women’s cigarettes: women’s cigarettes are low-tar, mild in taste and slim and delicate in appearance, so many women become smokers to catch up with the fashion In the past few years, the proportion of female smokers has greatly increased, while in cancer hospitals, the ratio of lung cancer patients between men and women has reached 1:1. last year’s statistics show that among lung cancer patients in our radiotherapy department, there are even a few more women than men. Experts say that smoking is a high risk factor for lung cancer, and smokers are highly susceptible to lung squamous cancer.