Bilateral hippocampal abnormalities in magnetic resonance imaging in transient global amnesia.

Transient global amnesia (TGA) is an isolated amnesic syndrome with normal neurologic examination. Patients remain alert and communicative with no loss of personal identity; however, they experience striking loss of memory for recent events and an impaired ability to retain new information. We report a case of TGA in a patient with acute ischemia in bilateral hippocampal abnormalities. This provides evidence in support of an ischemic hypothesis as the possible etiology of TGA.