Female, 12 months old, with new onset generalized tonic-clonic seizures. No evidence of parenchymal edema or mass effect is seen. No structural abnormalities are detected. Mild ill-defined T2 hyperintensity is seen in the periatrial white matter, left side more so than right.The pituitary region is unremarkable. The corpus callosum is fully formed and intact. The brainstem, cerebellar vermis and cerebellar hemispheres are within normal limits. The pattern of white matter myelination is appropriate for age.No evidence of intracranial hemorrhage or any abnormal extra-axial fluid collection is observed. The ventricular system is normal in size and morphology. The medial temporal lobe structures are symmetric and free of pathologic signal abnormality.
1.Mild periatrial white matter T2 hyperintensity is seen, left side more so than right. This is favored to represent the normal terminal zones of myelination.2.No definite focal parenchymal lesion, structural abnormality or other specific finding to account for the patient's seizures.