The probability of a pure ground glass nodule being benign in a pulmonary ground glass nodule is about 82%, and the probability of a mixed ground glass nodule being benign is about 37%. Lung nodules are defined as lung shadows ≤3 cm detected on imaging, and ground-glass nodules are defined as lung nodules with a ground-glass component. The ground glass component appears as a cloudy slightly dense shadow on chest CT. According to the composition of the ground-glass nodules, they can be divided into pure ground-glass nodules and mixed ground-glass nodules. Pure ground-glass nodules have no solid component and are composed only of ground-glass components, with a benign probability of 82%. Mixed ground-glass nodules are lung nodules with both solid and ground-glass components, with a higher malignancy rate of about 63%, and mixed ground-glass nodules have a benign probability of about 37%. Patients are advised to seek prompt medical attention and consult a specialist to comprehensively determine the risk of malignancy based on other descriptions such as nodule size and morphology, and to follow the doctor’s instructions for further examination and treatment.