Intraventricular meningioma status post radiation therapy: surveillance. There is no significant interval change of the T2 hypointense enhancing mass within the atrium of the left lateral ventricle, which measures up to 1.7 x 1.4 cm in axial cross-section. There is also unchanged surrounding ependymal enhancement and confluent T2 hyperintensity in the left peritrigonal white matter and posterior left thalamus with scattered punctate foci of susceptibility effect. There are unchanged nonspecific scattered punctate foci of cerebral white matter T2 hyperintensity. There is no evidence of acute intracranial hemorrhage, hydrocephalus, or acute infarct. There is no midline shift or herniation. The skull and scalp soft tissues are unremarkable.
No significant interval change of the left lateral ventricular mass with persistent ependymal enhancement and vasogenic edema in the adjacent brain parenchyma. 