A 5mm lung nodule that has not changed in two years is likely to be benign, and regular observation and follow-up is sufficient.
Lung nodule is a common lung problem, refers to the size of the lung imaging on the border is clear or fuzzy, the diameter of less than 3 cm of high-density rounded dense shadow, its pathogenesis is diverse, including many diseases, such as inflammation, tumors and so on.
When the lung nodule is less than or equal to 5mm, and there is no change for a long period of time, and the border is clear, its benign rate can be more than 95%, and only need to observe and follow up. When the nodule has exceeded 8mm, especially the presence of burrs, lobulation, pleural pull, vascular signs and vacuolar signs, etc., at this time the possibility of malignancy is greater, and need to improve the bronchoscopy or thoracoscopy and other tests to clarify the pathology.
A 5mm lung nodule that has not changed for two years is not a cause for undue concern, and regular follow-up is sufficient, but once the nodule changes, timely medical attention is needed to identify the cause.