Granulomas on the lungs are not the same thing as pulmonary nodules. Granulomas on the lungs are most often seen in pulmonary manifestations caused by tuberculosis infections and autoimmune diseases, where tuberculosis infections tend to form granuloma-like changes in the lungs, forming proliferative nodular lesions. Autoimmune diseases, including Wegener’s granulomatosis, rheumatoid arthritis, and systemic lupus erythematosus, also tend to form granulomatous changes in the lungs when lung damage occurs. Pulmonary nodules mainly include ground glass nodules, partially solid nodules and solid nodules. If the nodules are less than 5mm they are mostly chronic inflammatory changes and do not require special treatment. If the nodules are 6-8 mm or even larger than 8 mm with lobar, short burr, pleural traction sign, pleural depression sign, etc., they need to be alerted to the possibility of early lung cancer, and further enhanced CT examination of the chest and percutaneous lung puncture cytohistological examination should be given if necessary to clarify the diagnosis as early as possible to avoid missed diagnosis and misdiagnosis. Therefore, granulomatous disease on the lung is mostly benign, while nodules may be malignant or benign, and the two are not the same thing.