Secondary glioblastoma. There are post-surgical findings related to left frontal craniotomy. There is a heterogeneous, infiltrative mass surrounding the resection cavity and involving portions of the left inferior frontal lobe, insula, basal ganglia, and medial temporal lobe. There is unchanged nodular enhancement in the tumor along the inferolateral aspect of the left frontal lobe. However, there are new foci of enhancement within the portion of the tumor occupying the left basal ganglia. The otherwise non-enhancing infiltrative T2 hyperintense portions of the tumor have not significantly changed in size since the prior exam. There is no evidence of acute infarct. The ventricles are essentially unchanged in size and configuration. There is persistent subgaleal fluid overlying the craniotomy site, measuring up to 10 mm in thickness.
New foci of enhancement within the tumor in the left basal ganglia region, which may represent tumor progression versus treatment effects. Otherwise, the overall size of the tumor is not significantly changed.