title: [A lesion diagnosed by MRI in a case of transient global amnesia].
abstract: Transient global amnesia(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 T1- and T2-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.
authors.affiliation: Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
authors.forename: Takanori
authors.initials: T
authors.lastname: Inamura
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Nakazaki
authors.forename: Osamu
authors.initials: O
authors.lastname: Yasuda
authors.forename: Keiji
authors.initials: K
authors.lastname: Oi
authors.forename: Takato
authors.initials: T
authors.lastname: Morioka
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Akira
authors.initials: A
authors.lastname: Nakamizo
authors.forename: Satoshi
authors.initials: S
authors.lastname: Inoha
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Amano
authors.forename: Masashi
authors.initials: M
authors.lastname: Fukui
mesh_terms: D000647:Amnesia / Q000175:diagnosis*; D006624:Hippocampus / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013702:Temporal Lobe / Q000473:pathology; D014057:Tomography, X-Ray Computed