Status post resection of cerebellar osteosarcoma metastasis referred for post-operative SRS to cavity. There are postoperative findings related to right suboccipital craniotomy with mild susceptibility and presumed linear enhancement along the margins of the right cerebellar hemisphere resection cavity, which measures up to 25 mm. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. A subcentimeter nodular and linear focus of presumed enhancement in the left temporal fossa may represent a vascular or inflammatory lesion versus less likely a metastasis.
Pre-treatment planning MRI shows recent postoperative findings related to right suboccipital craniotomy.