I had a ct screening for calcium and they found : Visualized lungs show a sub-4 mm groundglass opacity in the right upper lobe. No pleural effusions. No adenopathy identified. The imaged osseous structures are unremarkable. The report said no follow up was required but I am concerned since I have a thyroid nodule which has just been biopsied and the result is that there is a suspicion of papilloma thyroid cancer Is is possible that the ground class opacity is an indication of thyroid metasis to the lungs?