Early diagnosis and treatment of lung cancer In recent 50 years, many countries have reported a significant increase in the incidence of lung cancer, which has now become the first malignant tumor with the highest incidence in urban and rural areas. Screening and early diagnosis of lung cancer, which are secondary prevention of lung cancer, can achieve the maximum reduction of the incidence of lung cancer. After a suspected lung nodule is detected on chest X-ray, contact with a lung tumor surgeon for chest CT examination to clarify the diagnosis and give treatment as early as possible. Postoperative follow-up of patients: Lung cancer is one of the malignant tumors with the fastest growing incidence and mortality rate, and one of the most threatening to the health and life of the population, and is a lifelong, systemic disease. Lung cancer requires close and systematic follow-up review after surgery, with comprehensive review every 3 months in the first and second year after surgery, every 6 months from the third to the fifth year after surgery, and every 1 year from the fifth year after surgery. The review items include: CT examination of chest and abdomen, MRI examination of head and ECT examination of bone.