 There are postoperative findings related to left frontoparietal craniotomy with a residual extra-axial fluid collection deep to the craniotomy that measures up to 15 mm in thickness. There is a subcentimeter focus of extra-axial nodular enhancement in the surgical bed overlying the left posterior frontal convexity. There is also persistent confluent T2 hyperintensity in the underlying brain parenchyma. In addition, there is susceptibility effect within posterior frontal lobe sulci, which is suggestive of prior subarachnoid hemorrhage or superficial siderosis. There is no evidence of acute infarct. The ventricles are unchanged in size and configuration. There is a partially-empty sella. The adenoids are prominent and contain several retention cysts.
Postoperative findings with a subcentimeter focus of extra-axial nodular enhancement in the surgical bed overlying the left posterior frontal convexity, which may represent residual tumor versus treatment effects. 