title: Serial magnetic resonance imaging changes in hypoglycemic encephalopathy.
abstract: OBJECTIVE
  Reports of serial magnetic resonance imaging (MRI) in hypoglycemic encephalopathy were limited because MRI is not routinely performed in these patients. Here we present one patient with a history of hypoglycemic encephalopathy and discuss sequential neuroimaging findings.
  
  
  METHODS
  A 53-year-old male mistakenly took oral hypoglycemic agents developed hypoglycemic encephalopathy. Immediate brain diffusion-weighted image (DWI) demonstrated extensive symmetrical hyperintensive lesions over bilateral subcortical white matter. 14 days later, new hyperintensive lesions involving bilateral cerebral cortex were found on DWI, while previous subcortical white matter lesions disappeared. On day 86, diffusion-weighted images abnormalities vanished and diffuse brain atrophy was noted.
  
  
  CONCLUSIONS
  Although subcortical white matter involvement in hypoglycemic encephalopathy was occasionally reported in the literature, few report revealed similar serial MRI changes as our case. Although its mechanism is still unknown, it is important to follow sequential images in hypoglycemic encephalopathy. The brain tissue which was normal in early DWI may not necessarily guarantee undamaged.
authors.affiliation: Department of Neurology, Mackay Memorial Hospital, Taiwan.
authors.forename: Chuo-Yu
authors.initials: CY
authors.lastname: Lee
authors.forename: Kuang-Chung
authors.initials: KC
authors.lastname: Liou
authors.forename: Lu-An
authors.initials: LA
authors.lastname: Chen
mesh_terms: D001284:Atrophy; D001921:Brain / Q000473:pathology*; D001927:Brain Diseases / Q000150:complications*; D038524:Diffusion Magnetic Resonance Imaging; D006801:Humans; D007003:Hypoglycemia / Q000150:complications*; D008297:Male; D008875:Middle Aged