Usually, beyond the size of the lesion itself, more attention needs to be paid to the imaging of the lesion, whether the lesion is solid or ground glass, lobulated or burred. If there are more typical imaging manifestations of lung cancer, such as lobulated nodules, surrounding burr infiltration, especially short burrs, subpleural nodules with adhesions, and “rabbit ear sign”, it usually indicates that the lesion is malignant. These patients require early intervention and, if necessary, surgical excision to avoid further development, regardless of the size of the nodule. For nodules with atypical imaging, such as simple ground glass nodules, subtle small nodules and irregular nodules, the nature of the nodules should be further determined by repeatedly reviewing CT images of the lungs over a certain period of time to observe the size and changes of the lesions. If the patient’s lesions develop further and suspicious imaging manifestations appear, the diagnosis can be clarified by means of puncture and bronchoscopy.