Complex partial seizure: acute memory impairment. Brain MRI: There is a punctate focus of restricted diffusion in the right hippocampus. There is no evidence of intracranial hemorrhage or mass. There are minimal nonspecific scattered foci of cerebral white matter T2 hyperintensity. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The orbits, skull, and scalp soft tissues are grossly unremarkable. There is a left maxillary sinus retention cyst.Brain MRA: There is no evidence of significant steno-occlusive lesions or aneurysms.Neck MRA: There is no evidence of significant steno-occlusive lesions.
1. A punctate focus of restricted diffusion in the right hippocampus likely represents an acute ischemic lesion related to "transient global amnesia".2. No evidence of significant steno-occlusive lesions involving the major head and neck arteries.