A 1.2 cm mixed ground-glass lung nodule without significant enhancement after enhanced CT indicates that the nodule does not have a large amount of blood supply, suggesting that there are ground-glass-like changes in the lungs, which may be benign tumors or malignant tumors, as follows. 1. Benign tumors: for example, bacterial infection, fungal infection and charcoal wood deposition in the lungs. These factors easily lead to lung tissue damage, when there is fluid exudation from the lung tissue, it will cause pulmonary ground glass nodules without obvious enhancement. 2. Malignant tumor: for example, early lung adenocarcinoma, which means micro-infiltrating adenocarcinoma or infiltrating adenocarcinoma, will cause non-inflammatory secretion when the cancer cells infiltrate into the lung tissues, and lung ground-glass nodules can be found through examination, and there is no obvious enhancement in the early stage through CT examination. At present, if pulmonary ground glass nodules are detected, it is necessary to go to the hospital for regular review, and if necessary, it is necessary to do pathological examination to exclude malignant lesions, and then according to the diagnostic results, follow the doctor’s instructions for targeted treatment.