The presence of mixed density nodules in the lungs should be referred to as mixed ground-glass nodules in the lungs, and their risk needs to be analyzed based on a combination of nodule size and morphology. Mixed ground-glass nodules in the lungs are defined as uneven density within the nodule, with the presence of partly solid nodules and partly ground-glass nodular changes. Since the component of solid nodules is greater than 50% of the whole nodule, the cancer rate of mixed ground-glass nodules is higher than that of solid nodules and pure ground-glass nodules. Therefore, in the case of mixed ground glass nodules, if there are abnormal imaging findings such as burrs, lobulation, or vacuoles, an early puncture biopsy is needed to clarify the nature of the nodule. If the nodule is relatively small, lung CT can be repeated in about three months to observe the change of the nodule and clarify the cause as soon as possible; if the nodule is large, it is necessary to go to the hospital in time and under the guidance of the doctor for surgical treatment.