A ground glass nodule of 6mm is not mandatory for surgical treatment. A ground glass nodule is a cloudy, well-defined, hyperdense shadow <3 cm in diameter that appears in the lung window on a CT scan of the chest. It does not obscure the blood vessels or bronchial shadow in the lung. It can be divided into pure ground glass nodules and mixed density ground glass nodules according to whether they contain a solid component. Many clinical conditions can manifest as mixed ground glass nodules on imaging, such as inflammation, bleeding, infection, allergy, tuberculosis, and even tumors. Benign nodules generally do not require surgery, and for 6mm ground glass nodules the chance of malignancy is relatively low because of their small diameter, and only increases with increasing diameter. The vast majority of 6mm nodules are benign and do not require surgical removal. If a 6mm nodule is found to be a purely ground glass nodule, a follow-up chest CT examination is recommended after 3 months, and if the lesion does not change, annual follow-up is possible. If the lesion gradually increases in size or solid component, or even shows signs of malignancy such as burr, lobulation, or pleural wrinkling, puncture or biopsy is required, followed by surgical treatment with clinical intervention if necessary. However, if the lesion is a ground glass nodule of mixed density, follow-up chest CT scans are generally recommended at 3, 6, 12, and 24 months, and when there is no change at follow-up, it can be converted to routine annual examinations. However, during follow-up, if the lesion increases in size or shows signs of malignancy, this is when puncture biopsy or surgery is recommended.