title: Hallucinations and signs of parkinsonism help distinguish patients with dementia and cortical Lewy bodies from patients with Alzheimer's disease at presentation: a clinicopathological study.
abstract: OBJECTIVE
  To compare, in a retrospective clinicopathological study, the presentation features of patients with dementia and cortical Lewy bodies (Lewy body dementia) with those of patients with Alzheimer's disease.
  
  
  METHODS
  From a population of 426 cases from the dementia brain bank, 39 cases of Lewy body dementia and 61 cases of Alzheimer's disease with presentation details were identified.
  
  
  RESULTS
  The Lewy body dementia group had significantly more frequent hallucinations (23% v 3%, P = 0.006) and signs of parkinsonism (41% v 5%, P < 0.0001) than the Alzheimer's disease group. The Lewy body dementia group also had a greater proportion of men (62% v 34%, P = 0.013).
  
  
  CONCLUSIONS
  Hallucinations and signs of parkinsonism help distinguish Lewy body dementia from Alzheimer's disease at presentation. These indicators may not be very sensitive, because they were reported for less than half of the patients with Lewy body dementia.
authors.affiliation: Department of Neurology, Ramsey Clinic/Health-Partners, University of Minnesota, St Paul, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Ala
authors.forename: K H
authors.initials: KH
authors.lastname: Yang
authors.forename: J H
authors.initials: JH
authors.lastname: Sung
authors.forename: W H
authors.initials: WH
authors.lastname: Frey
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000473:pathology* / Q000503:physiopathology; D003704:Dementia / Q000503:physiopathology*; D005260:Female; D006212:Hallucinations / Q000503:physiopathology*; D006801:Humans; D016631:Lewy Bodies / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000473:pathology* / Q000503:physiopathology