Breast cancer and brain metastases treated with surgery and CyberKnife treatments. There are postoperative findings related to right frontal lesionectomy. There is confluent high T2 signal and susceptibility effect surrounding the resection cavity, but no evidence of associated abnormal enhancement. However, there is an irregularly enhancing lesion in the left cerebellar hemisphere that measures up to 20 mm with extensive surrounding vasogenic edema. There is also an irregularly enhancing lesion in the left cerebellar hemisphere that measures up to 10 mm with mild surrounding vasogenic edema and a punctate focus of enhancement in the superior right cerebellar hemisphere. In addition, there is an enhancing lesion in the right occipital lobe that measures up to 5 mm. There are a few punctate foci of nonspecific cerebral white matter T2 hyperintensity without associated enhancement. There is no evidence of acute intracranial hemorrhage or acute infarct. The ventricles are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact.
1. Postoperative findings related to right frontal lesionectomy, without evidence of recurrent tumor in this area. 2. Multiple enhancing intracranial lesions are compatible with metastases, the largest of which is located in the left cerebellar hemisphere with extensive vasogenic edema, but no herniation.