Four years of follow up does not mean that the ground glass nodule is fine, still need to continue to follow up.
Four years of follow-up with no change in the ground-glass nodule does not guarantee that it is benign and should not be left unattended, but should be followed up.
Unlike solid nodules that remain unchanged for a long period of time, ground-glass nodules can only indicate that the possibility of deterioration is relatively small, but it cannot rule out the possibility of deterioration, so it is still important to pay attention to them.
It is recommended to prolong the interval between CT examinations of the lungs to observe whether the size and shape of the ground-glass nodules change, and if abnormalities are found, they can be surgically removed and biopsied to prevent malignant changes.