Status post craniectomy for resection of brain metastasis. There has been interval evolution of postoperative findings related to right parietal craniotomy for resection of a right parieto-occipital region mass. There is persistent confluent cerebral white matter T2 hyperintensity surrounding the resection cavity, which appears to communicate with the atrium of the right lateral ventricle. There is no evidence of acute intracranial hemorrhage, mass, or acute infarct. There are unchanged punctate foci of susceptibility in the cerebral white matter, which are likely treatment-related. There is unchanged encephalomalacia in the right cerebellar hemisphere. The ventricles are unchanged in size and configuration. There is an unchanged nonspecific background of scattered white matter T2 hyperintensity. There is no midline shift or herniation. There skull and scalp appear unchanged. There is a small right maxillary sinus retention cyst.
Stable post-treatment findings in the right parieto-occipital lobe region without definite evidence of recurrent tumor, although the assessment is limited by the lack of contrast administration.