Journal of Neurology

, Volume 239, Issue 8, pp 441–450

Dementia in cerebral amyloid angiopathy: a clinicopathological study

  • M. Yoshimura
  • H. Yamanouchi
  • S. Kuzuhara
  • H. Mori
  • S. Sugiura
  • T. Mizutani
  • H. Shimada
  • M. Tomonaga
  • Y. Toyokura
Original Communications
  • 68 Downloads

Summary

Dementia is in addition to cerebral haemorrhage major sympton of cerebral amyloid angiopathy (CAa). In order to explore the pathological basis for dementia in CAa-related conditions, we made a clinicopathological analysis of CAa, with special attention to dementia. Among 150 patients (mean age 78.6 years) with autopsy-proven intracranial haemorrhage in Tokyo Metropolitan Geriatric Medical Center, CAa with cerebral haemorrhage accounted for 8.0% (12 cases), associated with hypertension and metastatic brain tumour. Among 38 patients with lobar haemorrhage, CAa represented the second most common cause (21.1%) of intracranial haemorrhage after hypertension. A total of 20 patients with CAa (mean age 82.5 years) were studies clinically and pathologically. Hypertension was present in 50%. Thirteen had a history of stroke and others had either ill-defined or no strokes. The average number of strokes 2.9. Fifteen patients (75%) had dementia. Based on the clinicopathological grounds for dementia, CAa-related conditions could be divided into three subtypes: “haemorrhagic”, “dementia-haemorrhagic” and “dementia” type. Haemorrhagic type (30%, 6 cases) showed multiple recurrent lobar haemorrhages caused by CAa. Hypertension was present in only 1 patient. The incidence of senile plaques and neurofibrillary tangles was generally correlated with age. Only 1 patient had dementia. The dementia-haemorrhagic type (40%, 8 patients) had recurrent strokes with cerebral haemorrhage after preceding dementia. There were two different neuropathological subsets: CAa with atypical senile dementia of Alzheimer type (SDAT) and CAa with diffuse leucoencephalopathy. Patients with CAa with atypical SDAT had multiple cerebral haemorrhages caused by CAa combined with atypical Alzheimer-type pathology. Patients with CAa with diffuse leucoencephalopathy had cerebral haemorrhages in combination with diffuse white matter damage like Binswanger's subcortical vascular encephalopathy (BSVE). The incidence of senile changes correlated with age. Patients with the dementia type (30%, 6 patients) showed progressive dementia with or without haemorrhage. All had hypertension. They had a combined condition of Alzheimer-type pathology with conspicuous CAa with BSVE. Dementia in CAa-related conditions may be responsible for multiple factors including not Alzheimer-type degeneration, but also diffuse leucoencephalopathy like Binswanger's disease. We also found an asymptomatic type, an ischaemic type, a vasculitis type and an hereditary type in this condition.

Key words

Cerebral amyloid angiopathy Dementia Senile dementia of Alzheimer type Leucoencephalopathy β-protein 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • M. Yoshimura
    • 1
  • H. Yamanouchi
    • 3
  • S. Kuzuhara
    • 2
  • H. Mori
    • 1
  • S. Sugiura
    • 1
  • T. Mizutani
    • 1
  • H. Shimada
    • 4
  • M. Tomonaga
    • 5
  • Y. Toyokura
    • 3
  1. 1.Department of NeuropathologyTokyo Metropolitan Institute of GerontologyItabashi-ku, TokyoJapan
  2. 2.Department of Neurology, Faculty of MedicineUniversity of MieTsuJapan
  3. 3.Department of NeurologyTokyo Metropolitan Geriatric Medical CentreTokyoJapan
  4. 4.Department of PathologyTokyo Medical CollegeTokyoJapan
  5. 5.Department of Pathology, Brain Research InstituteTokyo UniversityTokyoJapan

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