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KMID : 0359720160340040360
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Journal of the Korean Neurological Association
2016 Volume.34 No. 4 p.360 ~ p.362
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Hippocampal Hyperintensities on Diffusion-Weighted MRI without Transient Global Amnesia
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Jeong Moon-Young
Kim Jeong-Hee
Jin Jae-Hyun
Lee Hye-Jin
Moon Yeon-Sil
Choi Jin-Woo
Kim Hahn-Young
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Abstract
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Dot-like hippocampal hyperintensities on diffusion-weighted magnetic resonance imaging (MRI) have been reported as an interesting imaging finding of transient global amnesia (TGA). We report three patients with such dot-like hippocampal hyperintensities who did not present with anterograde amnesia. Episodes associated with the Valsalva maneuver such as nausea or vomiting might have produced the dot-like hippocampal hyperintensities in these patients. However, depending on the individual susceptibility to hippocampal lesions, clinical symptoms of TGA might not be present even when hippocampal lesions are present.
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KEYWORD
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Transient global amnesia, Diffusion-weighted MRI, Hippocampus
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