title: Predicting the motor outcome of acute disseminated encephalomyelitis by apparent diffusion coefficient imaging: Two case reports.
abstract: We present two cases of young adults with acute disseminated encephalomyelitis (ADEM) who developed severe conscious and motor disturbances. Despite their similar initial clinical course and MRI findings, their motor function outcomes were quite different. In both cases, fluid attenuated inversion recovery (FLAIR) sequenced MRI showed multiple symmetric hyperintense lesions in the internal capsule and the brainstem at the subacute stage. However, in case 1 the apparent diffusion coefficient (ADC) was pathologically decreased in the internal capsule, whereas the ADC for case 2 was normal. At the end of the examination period, severe motor disability (bedridden state) with brain atrophy apparent on MRI remained in case 1, whereas case 2 made an almost full recovery without brain atrophy. These two cases suggest that altered ADC in the internal capsules at the subacute stage may reflect a different pathogenesis between cytotoxic and vasogenic edema, and may be a valuable indicator for the prognosis of motor disturbance.
authors.affiliation: Department of Neurology, Nagoya City University Graduate School of Medicine. 1-40 Kawasumi, Mizuho-ku, Nagoya, Japan.
authors.forename: Shoji
authors.initials: S
authors.lastname: Kawashima
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Matsukawa
authors.forename: Yoshino
authors.initials: Y
authors.lastname: Ueki
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamada
authors.forename: Keita
authors.initials: K
authors.lastname: Sakurai
authors.forename: Takemori
authors.initials: T
authors.lastname: Yamawaki
authors.forename: Kosei
authors.initials: K
authors.lastname: Ojika
mesh_terms: D000328:Adult; D038524:Diffusion Magnetic Resonance Imaging; D004673:Encephalomyelitis, Acute Disseminated / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D020772:Internal Capsule / Q000473:pathology*; D008297:Male; D011379:Prognosis