Benign lung nodules of 2 centimeters are not likely to become malignant in later stages, but the possibility of malignancy cannot be completely ruled out. When the size of benign lung nodule reaches 2 centimeters, the size of the nodule itself will be relatively large, but benign lung nodule often has its own peripheral tissue, and the surrounding normal tissues are more clearly demarcated, most of the cases will not occur malignant changes, and may remain stable for a long time. Some benign lung nodules that reach 2 centimeters in size may increase rapidly in a short period of time, and if the patient’s lungs are repeatedly infected and inflamed with chronic inflammation, coupled with the patient’s frequent smoking, all of these factors may cause adverse stimulation of the nodular tissue, which may lead to malignant changes. When a 2-centimeter benign pulmonary nodule appears, it is best to consult a doctor in time for a pathological biopsy to clarify the specific nature of the nodule, and if the size of the nodule continues to grow, it is best to have it surgically removed in time to prevent serious consequences such as malignant changes.