Small cell lung cancer mostly occurs in the central part of the lung, i.e., near the bronchus and mediastinum, around the hilum, with unclear borders, irregular morphology, and relatively rapid growth. Small cell lung cancer is a malignant tumor that occurs in the lungs. The imaging manifestations of the nodules are usually of a hairy glass or mixed density type, with rapid growth, mostly concentrated in the central part of the lungs, with occasional burrs on the outside, and usually as lobulated masses. Metastasis occurs in about 2/3 of patients, and common sites of metastasis include supraclavicular fossa lymph nodes, retroperitoneal lymph nodes, liver, bones, adrenal glands, and brain. It is recommended that patients with small cell lung cancer should go to regular hospitals for timely consultation, complete relevant examinations, early detection and diagnosis, and standardized treatment under the guidance of doctors to avoid delaying their conditions.