Lung nodules over 2 centimeters are not necessarily early stage lung cancer. Simply relying on the size of the lung nodule cannot determine the nature of the nodule, and cannot determine that it is early stage lung cancer. Lung nodules are nodular lesions that occur in the lungs, while lung cancer is a malignant tumor in the lungs. Although lung cancer is one of the causes of the appearance of lung nodules, there are other diseases besides lung cancer that can also cause the occurrence of lung nodules, such as pulmonary hemangioma, pulmonary misshapen tumor, tuberculosis, and so on. Individuals who find lung nodules of more than 2 centimeters in size should undergo further examination to clarify the pathological nature of the nodules. If lung cancer is diagnosed, standardized treatment should be carried out through pathological staging, and early intervention is the only way to improve the prognosis of the disease effectively.