Epilepsy and autism with increased frequency of staring episodes and worsening behavior and sleep issues. There is persistent subcortical T2 hyperintensity in the right parahippocampal and fusiform gyri without appreciable mass-effect or volume loss. The hippocampi appear to be unaffected. There is no evidence of intracranial hemorrhage or acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are grossly unremarkable. There is a small right maxillary sinus retention cyst.
A persistent subcortical lesion involving the right parahippocampal and fusiform gyri without appreciable mass-effect may represent gliosis rather than a low-grade neoplasm, for example. Follow up via MRI with contrast may potentially offer additional insights.