GBM. There are post-surgical changes at the right inferior frontal lobe, insula, and anterior temporal lobe. There is extensive T2 hyperintensity in the surrounding white matter. There is predominantly linear enhancement along the anteromedial aspect of the surgical bed and extending across the corpus callosum just beyond midline. This appears similar to the prior outside MRI, accounting for differences in technique and there is no appreciable elevated perfusion. The ventricles and basal cisterns are unchanged. There is no midline shift or herniation. The major cerebral flow voids are intact. There is mild paranasal sinus mucosal thickening and fluid in the right mastoid air cells. The skull and scalp soft tissues are unchanged.
Post-treatment findings in the right cerebral hemisphere with persistent periventricular enhancement in the anterior lateral ventricle regions that may predominantly represent treatment effects, such as radiation necrosis. I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.