Metstatic lung cancer treated with WBRT, Erlotinib, and MPDL3280A. There an unchanged enhancing lesion in the right cerebellar hemisphere that measures 2 x 2 mm. There is encephalomalacia within the left gyrus rectus. There is also a chronic lacunar infarct in the left basal ganglia with hemosiderin deposition. There are a few scattered nonspecific foci of T2 hyperintensity in the cerebral white matter. There is no evidence of acute intracranial hemorrhage or acute infarction. There is a an unchanged enhancing extra-axial lesion along the left anterior clinoid process region. The ventricles are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are grossly unremarkable. There is metal susceptibility effect in the left frontal calvarium.
1. Unchanged punctate metastasis in the right cerebellar hemisphere.2. Unchanged paraclinoid lesion may represent a meningioma.3. Encephalomalacia in the left gyrus rectus.