Clear cell ependymoma (grade 3) s/p craniotomy x 2 and radiation therapy. There are postoperative findings related to left frontal craniotomy for tumor resection. There is a lobulated enhancing tumor in the medial aspect of the resection cavity that measures up to approximately 12 mm, which is not significantly changed. Likewise, there is no significant change in the extent of patchy areas of T2 hyperintensity in the white matter surrounding the resection cavity. However, there is slight interval increase in size of the cystic space anterior to the tumor. There is no evidence of acute infarction. The ventricles are stable in size and configuration. There is no midline shift. The major cerebral flow voids are grossly intact. The skull and extracranial soft tissues are unchanged.
Stable treated tumor measuring in the left frontal lobe resection cavity, but continued slight interval increase in size of a cystic space anterior to the tumor, which may represent an peritumoral cyst or prominent perivascular space.