A nodule with a diameter of about 0.6cm seems to be seen in the middle band of the upper lobe of the right lung. Whether it is serious or not depends on the nature of the nodule; benign nodules are generally not serious and malignant nodules are more serious. 0.6cm nodule belongs to the smaller diameter nodule, the diameter of the nodule and the probability of malignancy are closely related, the larger the diameter of the nodule, the higher the risk of malignancy, the malignancy rate of the nodule diameter of less than 5mm is less than 1%, the malignancy rate of the diameter of 5-10mm increases to 6%-28%, the malignancy rate of the diameter of more than 20mm is as high as 64%-82%. Therefore, the possibility of malignant transformation of 0.6cm nodule is relatively small, and it can be left without special treatment for the time being, and observed and followed up according to the doctor’s instructions. 0.6cm nodules may be malignant lung nodules, which may grow in a short period of time. When the nodules grow rapidly, it is feasible to further define the nature of the nodules through enhanced CT, pathological biopsy and other examinations, and once it is clear that the nodules are malignant, it is necessary to take timely treatment by way of surgery, radiotherapy, chemotherapy and other methods. Therefore, patients who seem to see a nodule with a diameter of about 0.6cm in the middle band of the upper lobe of the right lung should go to the hospital in time and choose the appropriate treatment plan under the guidance of the doctor.