Lung nodules are masses less than 3 cm in size that appears as round, white dots (small tissues) that can be seen on a chest X-ray or computed tomography (CT) scan.
Because lung nodules are usually benign, they do not require any treatment. If the nodule is seen as the same size in radiological examinations performed at long intervals, the probability of being malignant is very low. However, the size or shape of the nodules should be monitored and followed at regular intervals with follow-up and scans by the doctor.
Tests may be ordered to determine if some of the lung nodules are malignant (cancer) due to growth and deformity. In general, while nodules smaller than 3 mm tend to be benign, it may be appropriate to examine nodules 20 mm and larger with more advanced methods in case they are malignant.