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Lung cancer, one of the leading global cancers leading to death, can be considered as harmful. While other types of cancer, such as breast and prostate cancer, may be of greater concern in public view, the high incidence of and mortality from lung cancer has become an important area of medical research. This paper will explore some cold-blooded knowledge points on lung cancer with a view to raising public awareness of lung cancer. Lung cancer can be classified into two main groups: Small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). Among these, non-small cell lung cancers include subtypes such as carving cell cancer, gland cancer and large cell cancer. Small-cell lung cancer grows rapidly and transfers early, and is sensitive to chemotherapy and treatment, but has a high relapse rate. Non-small cell lung cancer grew relatively slowly, but the response to treatment was less than that of small cell lung cancer. Although smoking is the main risk factor for lung cancer, not all lung cancer patients have a history of smoking. The study found that lung cancer is closely related to genetic factors. For example, certain gene mutations, such as the EGFR (surfactor growth factor receptor) mutation and the AlK (inter-transformation lymphoma enzyme), are more common among non-smokers. These gene mutations can serve as targets for treatment and provide patients with more personalized treatment. 3. Early diagnosis of lung cancer. Early symptoms of lung cancer, such as coughing, chest pains, noises, etc., are often not visible and can easily be confused with other respiratory diseases. The early diagnosis of lung cancer is therefore very difficult. Currently, low-dose spiral CT scans are one of the effective means of early detection of lung cancer, but their screening effectiveness and cost-effectiveness remain controversial among the non-symptomatic population. 4. Immunization treatment for lung cancer has made breakthrough progress in recent years in the area of lung cancer treatment. The use of PD-1/PD-L1 inhibitors can activate the patient ‘ s own immune system and attack cancer cells, especially for patients with high levels of expression in PD-L1 (procedural death formulation 1). This treatment offers new hope for terminal lung cancer patients, but its high cost and possible side effects cannot be ignored. 5. The rare complication of lung cancer, for example, can sometimes be transmitted by lung cancer cells to a substance known as an isopromoting adrenal cortex hormone (ACTH), leading to the Coutin syndrome in the form of increased body weight, hypertension and muscle incapacitation. In addition, lung cancer can cause high blood condensation, resulting in the formation of an embolism and increasing the risk of pulmonary embolism. 6. Although genetic factors play an important role in the occurrence of lung cancer, lifestyle changes can also significantly reduce the risk of lung cancer. The cessation of smoking is the first measure to prevent lung cancer, and the reduction of occupational exposure to carcinogens, the avoidance of indoor air pollution, the maintenance of healthy diets and adequate exercise are also effective methods of preventing lung cancer. There are significant global differences in the incidence of lung cancer, for example, in East Asia, where glands account for a high proportion of lung cancer, which may be associated with higher exposure to indoor air pollution in the region. In Western countries, carcinoma is more common among males with higher smoking rates. These differences point to the need to take regional characteristics into account when developing strategies to combat lung cancer. 8. Clinical trials of lung cancer and future directions. New drugs and treatments in the field of lung cancer treatment continue to be introduced into the clinical trial stage, for example, targeted drugs for specific gene mutations, joint immunization programmes and individualized medical strategies. Future research will focus more on multidisciplinary and integrated treatment and on how newly discovered biomarkers can be used in clinical practice to improve treatment effectiveness and patient survival. Through continuous research and education, we hope to be able to increase the rate of early detection of lung cancer, improve its treatment and, ultimately, reduce its morbidity and mortality. Let us work together to bring more hope and light to those with lung cancer.