Lung cancer metastasis to the brain, status post SRS treatment. There are postoperative findings related to left pterional craniotomy with increased enhancement along the surgical margins and persistent high T2 signal surrounding the left temporal resection cavity. There is otherwise no evidence of intracranial mass lesions elsewhere. There appears to be a chronic lacunar infarct in the right corona radiata. There are a few other scattered nonspecific T2 hyperintense white matter lesions. There is no evidence of acute infarction or hemorrhage. There is no significant midline shift or herniation. The ventricles are unchanged in size. The skull, paranasal sinuses, and orbits appear to be unchanged.
Postoperative findings in the left temporal lobe with increased enhancement along the surgical margins, which may represent tumor progression or treatment-effects. Otherwise, no evidence of intracranial metastases elsewhere. 