title: Brain magnetic resonance diffusion abnormalities in Creutzfeldt-Jakob disease.
abstract: BACKGROUND
  Magnetic resonance imaging of the brain has been of limited usefulness in the diagnosis of Creutzfeldt-Jakob disease. Abnormalities on T2-weighted images have been described, but these are neither highly sensitive nor specific.
  
  
  OBJECTIVE
  To determine whether diffusion-weighted magnetic resonance images might be useful in the evaluation of Creutzfeldt-Jakob disease.
  
  
  METHODS
  A 61-year-old woman with rapidly progressive dementia was referred for cranial magnetic resonance imaging. Diffusion-weighted images were obtained as part of the examination. Brain biopsy confirmed the diagnosis of Creutzfeldt-Jakob disease histologically.
  
  
  CONCLUSIONS
  The diffusion-weighted magnetic resonance brain images demonstrated bilaterally symmetrical marked increase in signal intensity in the caudate nuclei, putamina, thalami, cingulate gyri, and right inferior frontal cortex. The apparent diffusion coefficient map showed abnormally low diffusion in these regions (as low as 40% of normal in the caudate head). This suggests that there is restricted diffusion in these regions. The T2-weighted images demonstrated slightly increased signal bilaterally in the caudate nuclei and putamina. These findings indicate that diffusion magnetic resonance imaging might be a sensitive means of imaging the abnormalities seen in Creutzfeldt-Jakob disease.
authors.affiliation: Neuroradiology Section, Mallinckrodt Institute of Radiology, St. Louis, Mo., USA. bahn@mirlink.wustl.edu
authors.forename: M M
authors.initials: MM
authors.lastname: Bahn
authors.forename: D K
authors.initials: DK
authors.lastname: Kido
authors.forename: W
authors.initials: W
authors.lastname: Lin
authors.forename: A L
authors.initials: AL
authors.lastname: Pearlman
mesh_terms: D001706:Biopsy; D001921:Brain / Q000473:pathology; D007562:Creutzfeldt-Jakob Syndrome / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged