Lennox-gastaut syndrome with intractable epilepsy: preoperative planning. There is no evidence of intracranial hemorrhage or mass. The brain appears unremarkable on the provided T1-wegithed sequence. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable. The calvarium is diffusely thickened, perhaps due to the long-term effects of anti-epileptic medication.
Preoperative planning MRI does not demonstrate any gross potential seizure focus.