Glioblastoma treatment planning. There are postoperative findings related to prior right frontal craniotomy. There is redemonstration of a heterogeneous mass that measures up to approximately 9 cm, centered within the right frontal lobe, with midline shift and extension across the midline and into the basal ganglia. There is effacement of most of the right lateral ventricle, but dilatation of portions of the third and left lateral ventricles. There is also heterogeneous tumor in the left cerebellar hemisphere and vermis with extension into the fourth ventricle, with diffuse surrounding high T2 signal in the cerebellum and brainstem.
Treatment planning MRI redemonstrates a large mass centered in the right frontal lobe, with associated ventricular entrapment, and tumor in the posterior fossa.