title: A case of acute cerebellitis with a unique sequential change on magnetic resonance imaging.
abstract: BACKGROUND
  Acute cerebellitis with unilateral onset is rare, and magnetic resonance imaging (MRI) is a useful method for demonstrating cerebellar involvement.
  
  
  METHODS
  We report a 12-year-old girl with acute cerebellitis with a unique sequential change on her MRI.
  
  
  RESULTS
  The patient's brain MRI first revealed cortical lesions mainly in the right cerebellar hemisphere. These subsequently disappeared, and at the same time, new lesions appeared in the opposite cerebellar hemisphere. All the lesions were confined to gray matter in the cerebellum and were isotense on diffusion-weighted imaging and had high signal intensity on the apparent diffusion coefficient map, consistent with the characteristic of vasogenic edema.
  
  
  CONCLUSIONS
  The sequential MRI demonstrates conversion of hemicerebellitis to bilateral cerebellitis during subacute phase, and vasogenic edema might be contributing to the pathogenesis of acute cerebellitis in this patient.
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Saeko
authors.initials: S
authors.lastname: Suzuki
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Akimune
authors.initials: A
authors.lastname: Kaga
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Natsuko
authors.initials: N
authors.lastname: Kusaka
authors.affiliation: Department of Pediatrics, Tohoku University School of Medicine, Sendai, Miyagi, Japan.
authors.forename: Mitsugu
authors.initials: M
authors.lastname: Uematsu
authors.affiliation: Department of Pediatric Neurology, Takuto Rehabilitation Center for Children, Sendai, Miyagi, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Haginoya
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Katata
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Matsubara
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Ishida
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan.
authors.forename: Setsuko
authors.initials: S
authors.lastname: Kitaoka
authors.affiliation: Department of Pediatrics, Sendai Medical Center, Sendai, Miyagi, Japan. Electronic address: kumaki@med.tohoku.ac.jp.
authors.forename: Satoru
authors.initials: S
authors.lastname: Kumaki
mesh_terms: D000208:Acute Disease; D001929:Brain Edema / Q000473:pathology; D002525:Cerebellar Cortex / Q000473:pathology* / Q000503:physiopathology; D002526:Cerebellar Diseases / Q000473:pathology* / Q000503:physiopathology; D002648:Child; D038524:Diffusion Magnetic Resonance Imaging; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*
keywords: apparent diffusion coefficient map; cerebellitis; diffusion weighted imaging; magnetic resonance imaging; unilateral onset