Metastatic lung cancer. The enhancing left cerebellar lesion has decreased in size, measuring up to 11 mm, previously 16 mm. In addition, the surrounding vasogenic edema has diminished. There is unchanged mild nonspecific periventricular white matter T2 hyperintensity. There is no evidence of new intracranial lesions. There is no evidence of intracranial hemorrhage or acute infarct. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
The left cerebellar metastasis has decreased in size and the surrounding vasogenic edema has diminished.