Staging for lung cancer. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are a few non-enhancing punctate foci of T2 hyperintensity scattered within the cerebral white matter. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is a partially empty sella. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and mastoid air cells are grossly unremarkable. However, there is an enhancing 6 mm diameter nodule in the right lateral scalp.
1. No evidence of intracranial metastases. 2. A few non-enhancing punctate foci of T2 hyperintensity scattered within the cerebral white matter are nonspecific, but may represent chronic small vessel ischemic disease.3. An enhancing 6 mm diameter nodule in the right lateral scalp may represent a metastatic deposit, among other possibilities. 