Malignant nodules in the lungs actually refer to malignant tumors in the lungs, which are mainly pathologically described by CT or MRI examinations of both lungs. Generally, the imaging manifestations are nodules of different degrees, extremely irregular morphology and different numbers of nodules in the lungs, which may have eccentric cavities and burr formation, and are accompanied by some symptoms, such as wasting, weakness, cough and recurrent hemoptysis. In general, pathological examination of malignant nodules in the lungs can be performed to clarify the cancerous classification of malignant nodules and to formulate corresponding treatment measures to avoid delay.