Secondary malignant neoplasm of brain [C79.31], Reason for Study: ^Reason: NSCLC. s/p WBRT >1yr ago. History: ? L occipital lesion increasing in size? Comparing to prior scan, there are some enhancing nodules are not seen on current scan and there are some new lesions appear. Specifically, previously seen 1) subtle enhancing right superior frontal sulcus lesion is not seen, 2) right parieto-occipital lesion is not seen, and 3) the left occipital enhancing lesion appears to be slightly smaller than before.On the other hand, there are new enhancing lesions at 1) the left superior parietal lobule, 2) right parieto-occipital lesions, 3) right occipital lobe cuneus just above the calcarine fissure, 4) right occipital lobe lingual gyrus. There is no evidence of acute ischemic or hemorrhagic lesion.The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Interval development of new enhancing nodules as well as interval disappearance of previously noted enhancing nodules as described above. 