Every year, when a unit organizes a physical examination for its employees, there are always single or multiple nodules <1.0 cm in diameter in the lungs detected by chest X-ray or chest CT. Patients cannot help but worry about this: what kind of nodule is it, is it lung cancer, or is it a benign lesion? What kind of nodule is it? Does it have to be removed surgically? Is an asymptomatic small lung nodule lung cancer? In addition to lung cancer and congenital abnormalities of lung development, lung infectious diseases, including pneumonia, tuberculosis, bronchiectasis, pulmonary aspergillosis, etc., are also more common. Therefore, finding a "lung shadow (nodule)" does not necessarily mean that it is lung cancer; there are many benign diseases that can also manifest as small nodules. Once small lung nodules are found, patients do not need to be overly nervous, they can go to a general hospital or specialist hospital for consultation in the department of inhalation medicine or thoracic surgery, and doctors will choose other auxiliary examinations such as fiberoptic bronchoscopy, CT localization puncture, sputum cell examination, etc. to further clarify the diagnosis according to the patient's specific situation. Second, who should be especially careful of small lung nodules? In daily life, there are several types of people who should not take it lightly when small shadows or nodules in the lungs are found on physical examination, and should actively consult a professional physician to receive formal further examination and timely treatment: (1) long-term smokers, those who have smoked for more than 20 years, those who smoke more than 20 cigarettes per day, or those who have passive smoking; (2) those who are over 40 years old; those who have chest pain, cough, unexplained (3) Those with a familial history of tumors, especially a genetic history of lung cancer; (4) Those with a nodule diameter of about 1 cm or more, accompanied by burr-like, lobulated or hairy glass-like changes; (5) Repeated occurrence of pneumonia and segmental atelectasis in the same area. Third, how to deal with suspected small pulmonary nodules? If small lung nodules are highly suspected to be early stage lung cancer, surgical resection can achieve a 5-year survival rate of more than 80%. The significance of early detection and treatment is completely different for the prognosis and quality of life of patients. Due to the rapid development of multi-layer spiral CT and low-dose CT scan technology in recent years, clinicians can detect small lung nodules at an early stage, and nodules less than 2 mm in diameter can be clearly revealed, which not only makes it more difficult for doctors to make diagnosis, but also brings certain troubles to patients whether to receive treatment or not. For small shadows or nodules in the lungs found on physical examination, especially for the above-mentioned small nodules that are highly suspicious in several populations, full attention should be paid to them. For nodules <1cm in diameter, they should be analyzed based on CT signs, combined with other information, and closely followed up; nodules with a diameter of about 1cm, CT signs of ground glass shadow, lobar sign, burr sign, bronchial air phase, vacuole, pleural tail sign, should be actively Thoracoscopic surgery should be performed to make the correct diagnosis and treatment of small pulmonary nodules in a timely manner. At present, the Department of Whistology and the Department of Thoracic Surgery of our hospital combine the preoperative CT-guided minimally invasive localization technique with television thoracoscopy (VATS) surgery to obtain pathological diagnosis and also remove the lesion with minimal trauma, and also remove the serious psychological burden of some patients, which significantly improves the quality of survival of patients.