The chances of a ground glass lung nodule being lung cancer may be around 10 to 64 percent. It depends on the size and composition of the patient’s nodule. There are two types of ground-glass lung nodules; one type of nodule consists entirely of ground-glass components with no parenchymal components and is called a pure ground-glass nodule. The other type of nodule consists of both ground glass and parenchymal components and is called a mixed ground glass nodule. Pure ground-glass nodules with a diameter of less than 5 mm are low-risk nodules with a small cancer rate of about 10%. Pure ground glass nodules that are larger than 5 mm in diameter are considered to be medium-risk nodules, with a moderate cancer rate of about 10 to 50 percent. In the case of mixed ground glass nodules, they are high risk nodules with a higher cancer rate of about 64% and are usually a common manifestation of lung cancer. If you develop ground-glass nodules, it is recommended that you consult a doctor promptly and take appropriate treatment under the guidance of a professional doctor.