Small cell lung cancer nodules are characterized by being located in the central part, around the hilum, unclear boundary, irregular shape and relatively fast growth. Small cell lung cancer is a malignant tumor occurring in the lungs, which is usually caused by excessive division and proliferation of tissues in the glands or bronchial mucosa, and its prognosis is generally poor, and it should be detected and treated as early as possible. Small cell lung cancer has a higher degree of malignancy, and its nodules usually show hairy glass or mixed density type in imaging examination. Its growth rate is relatively fast, mostly concentrated in the center of the lungs, with occasional burrs on the outside, and it is usually a lobulated mass. Patients with small cell lung cancer are prone to symptoms such as fatigue, fever, cough, sputum, etc. In severe cases, hemoptysis may occur. Generally, patients with a history of smoking or emphysema should go to the hospital for treatment in time, and pay attention to review and follow-up.