I have been having many problems include stomach pain. A stomach CT showed a nodule of 1.0 cm in lower lung. Today I had a Chest CT. Waiting on results. My real concern is that the diagnosis code listed as the reason for the Chest CT was 158.89 which means Malignant neoplasm stated or presumed to be primary of specified sites. What does this really mean? It that was the doctor puts on any nodule?