With the increasing number of lung cancer patients, the public has gradually recognized and accepted the fact that lung cancer is a common disease, but for lung cancer patients and the public, I feel that they still do not know much about this disease, so much so that they are afraid of talking about lung cancer. Since I have been a thoracic surgeon, I have seen many lung cancer patients and found that many patients and their families have misunderstandings about lung cancer treatment. Here are some of the common problems that I have selected to solve and answer, in the hope that lung cancer patients can receive timely and standardized treatment and take less detours. Myth 1: Smoking does not necessarily lead to lung cancer. 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 screwed ends or ordinary cigarettes with or without filters, it is impossible to 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 clear that quitting smoking is indeed the most effective measure to prevent lung cancer. Myth 2: Lung discomfort does not require 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 pay attention to them, thinking that they will be cured in a few days or that they 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 surgical treatment can be achieved, the 5-year tumor-free survival rate of lung cancer can reach 60% to 90%. Therefore, once suspicious symptoms appear in the lungs, it is very necessary to go to hospital for timely diagnosis and treatment. Myth 3: There is no need to treat lung cancer in the middle and late stages? Because some lung cancer patients do not receive timely treatment, when 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 only survive for 3-4 months without treatment, but after comprehensive treatment such as surgery, the quality of survival is significantly improved, and some patients can even survive for 3-5 years. It can be seen that the result is very different between treatment and no treatment. Myth 4: Surgery is not necessary for elderly lung cancer and advanced lung cancer In clinical practice, we often hear such statements as “the tumor is too big to be operated, and the patient will not live for a few days” or “the old man is too old and weak to be operated”. This actually involves the issue of indications for lung cancer surgery. Clinical experience shows that age is not a contraindication for lung cancer surgery, and even an old man in his 80s can obtain good treatment results through surgery and comprehensive treatment. As with the treatment principles for many solid tumors, only by undergoing radical surgery can lung cancer patients have the possibility of long-term survival.