Three Cases of Transient Global Amnesia with Focal High Signal Intensity in Hippocampus in Diffusion Weighted Image

J Korean Neurol Assoc > Volume 25(2); 2007 > Article

Journal of the Korean Neurological Association 2007;25(2): 209-212.

확산강조영상에 국소적 고강도신호를 해마에서 보인 일과성전기억상실 3예

이승환, 이서영 장상현a 박문호a 김성훈

강원대학교 의과대학 신경과학교실, 고려대학교 의과대학 신경과학교실a

Three Cases of Transient Global Amnesia with Focal High Signal Intensity in Hippocampus in Diffusion Weighted Image

Seung Hwan Lee

Department of Neurology, College of Medicine, Kangwon National University Department of Neurology, College of Medicine, Korea Universitya

Abstract

Transient global amnesia (TGA) is an amnesic disorder which is characterized by temporary loss of anterograde and recent retrograde memory with preserved consciousness. Though the pathogenesis of TGA is still unclear, current hypotheses include migraine, seizure, or cerebral ischemia. We present three patients with TGA who showed signal intensity change in diffusion weighted image in hippocampus. These findings might suggest that ischemia in hippocampus might be the cause of the TGA. KeyWords:Transient global amnesia, Diffusion weighted image, Hippocampus