Lung cancer is not related to smoking? It is indisputable that smoking is one of the main causes of lung cancer. Some data show that about 85% to 90% of lung cancer patients are “smokers”. Whether they smoke homemade cigarettes with two twists or ordinary cigarettes with or without a filter, they cannot escape the damage of smoke. Chemical analysis of smoke particles and contaminated air has found that they contain more than 50 carcinogenic substances. It is evident that quitting smoking is indeed the most effective measure to prevent lung cancer. Zhang Weijian, Department of Radiotherapy, The First Hospital of Fujian Medical University No more treatment for middle and late stage lung cancer? As some lung cancer patients are not treated in time, when they are diagnosed, the disease has already developed to the middle and late stages, and many of them have already involved the heart and large blood vessels. Therefore, some people think that since the disease has developed to the middle and late stage, it is the same whether to treat or not to treat. In fact, it is not. Statistics show that patients with advanced lung cancer can survive only 3~4 months without treatment, but after taking comprehensive treatment such as radiotherapy, the quality of patients’ survival is obviously improved, and some patients can even survive 3~5 years. It can be seen that the result is very different between treatment and no treatment. Radiotherapy for lung cancer can achieve the purpose of maximizing the killing of cancer cells and protecting the function of normal tissues and organs. Lung discomfort without examination? Chest pain, cough or blood in sputum are common symptoms of lung cancer or “basic symptoms”. In the early stage of lung cancer, chest pain and cough may not be so obvious, so many people do not take it seriously, thinking that it will be cured in a few days, or that it is inflammation and will be fine after taking some anti-inflammatory drugs. As a result, it is not uncommon for people to go to the hospital for examination, resulting in “carelessness”. According to some information, only 20% of the diagnosed lung cancer patients are in the early stage of the disease, while 80% of them are in the middle or late stage. In fact, if early examination, early diagnosis and early treatment can be achieved, the 5-year tumor-free survival rate of lung cancer can reach 60%-90%. It can be seen that once suspicious symptoms appear in the lung, it is very necessary to go to hospital for consultation and treatment in time.