A lesion diagnosed by MRI in a case of transient global amnesia

Takanori Inamura, Kiyoshi Nakazaki, Osamu Yasuda, Keiji Oi, Takato Morioka, Yasuhiko Nakamura, Akira Nakamizo, Satoshi Inoha, Toshiyuki Amano, Masashi Fukui

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Abstract

Transient global amesia (TGA) had been recognized as a disease without abnormal findings on neuroimaging before magnetic resonance (MRI) imaging was practicable. Recently, abnormal findings on MRI reported in cases of TGA. We here reported a case of TGA showing a transient abnormal intensity in left hippocampus on MRI diffusion-weighted image. A 52-year-old man suddenly became to unable to keep his recent memory without histories of trauma or epilepsy. He showed no abnormal neurologic findings excepting for the recent memory. MRI performed within an hour after onset demonstrated no abnormality on T 1-and T 2-weighted images. Diffusion-weighted image (b = 1,000) showed hyperintensity in the left medial temporal lobe, and the apparent diffusion coefficient(ADC) in this region was lower (72.8 cm2/s) than that in the contralateral region (94.4 cm2/s). TGA was completely resolved 17 hours after onset.

Original languageEnglish
Pages (from-to)419-422
Number of pages4
JournalBrain and Nerve
Volume54
Issue number5
Publication statusPublished - Jun 18 2002

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All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

Inamura, T., Nakazaki, K., Yasuda, O., Oi, K., Morioka, T., Nakamura, Y., ... Fukui, M. (2002). A lesion diagnosed by MRI in a case of transient global amnesia. Brain and Nerve, 54(5), 419-422.