Resected surgery for a right frontal lobe anaplastic oligodendroglioma (WHO grade III). There are recent postoperative findings related to subtotal right frontal tumor resection with a small amount of hemorrhage in the region of the surgical cavity and along the right lateral ventricle choroid plexus and overlying extradural fluid collections that measure up to 7 mm in width. There is residual heterogeneously enhancing tumor along the posterior and superior margins that measures up to 20 mm in thickness. There is also a small amount of enhancement along the anterior medial margin. There appear to be small areas of restricted diffusion along the surgical margin, which may be related to the effects of blood products, but no acute territorial infarct. There is persistent extensive surrounding vasogenic edema and up to approximately 10 mm of midline shift to the left, as well as subfalcine herniation and partial effacement of the right lateral ventricle. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
Recent postoperative findings related to subtotal right frontal tumor resection with evidence of residual tumor along the surgical margins, particularly posteriorly and superiorly, as well as persistent extensive vasogenic edema and approximately 10 mm of midline shift.