Seizure. History of neurofibromatosis type I. Assess for seizure focus. Small foci of subtle T2-hyperintensity are present in the globi pallidi, posterior thalami, brainstem and cerebellar white-matter, compatible with the diagnosis of neurofibromatosis type I. The corpus callosum is diffusely, but mildly thickened without a focal lesion. There is no space-occupying or contrast-enhancing brain lesion. There is no intracranial hemorrhage or acute infarct. The ventricles, sulci and basal cisterns are normal in size. The major intracranial vascular flow voids are preserved.The optic nerves and the other orbital structures are grossly unremarkable. The mastoid air cells and middle ear cavities are clear. There is no skull destructive lesion.
1.Stigmata of neurofibromatosis type I including multiple small focal T2-hyperintense lesions without mass-effect or contrast enhancement in the brain (FASI) as well as mildly thickened corpus callosum. 2.No appreciable intracranial neoplasm or other focal lesion to suggest seizure focus.