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KMID : 1100220050040010049
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Dementia and Neurocognitive Disorders
2005 Volume.4 No. 1 p.49 ~ p.51
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Delayed Diffusion-weighted Imaging Changes in Patients with Transient Global Amnesia
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Kim Jung-Eun
Kim Tae-Hyung
Lim Jun-Sung
Kim Sang-Yun
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Abstract
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We report two patients with transient global amnesia (TGA) showing increased signal intensity in the hippocampus on diffusion-weighted image (DWI) performed in a few days after onset. One patient was scanned at 72 hours since symptom onset which demonstrated high signal intensity lesion in the right huppocampus. The other patient underwent initial DWI at 18 hours and follow-up DWI at 72 hours postonset. In this patient a left hippocampal lesion was detected only on follow-up DWI. These results support the involvement of hippocampus in the pathophysiology of TGA and the abnormality in delayed imaging may explain the inconsistence of previous DWI studies in TGA patients.
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KEYWORD
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Transient global amnesia, Diffusion-weighted MRI
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