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Diagnosing dementia: do we get it right?

A C Homer1, M Honavar, P L Lantos

  • 1Department of Geriatric Medicine, Jenner Wing, St George's Hospital Medical School, London.

BMJ (Clinical Research Ed.)
|October 8, 1988
PubMed
Summary
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Clinical dementia diagnosis often disagrees with necropsy findings, particularly overdiagnosing Alzheimer's disease. Neuropathological studies are crucial for accurate dementia diagnosis in the elderly.

Area of Science:

  • Geriatric Medicine
  • Neurology
  • Pathology

Background:

  • Accurate diagnosis of dementia in elderly patients is challenging.
  • Clinical assessments may not always align with post-mortem neuropathological findings.

Purpose of the Study:

  • To evaluate the concordance between clinical dementia diagnoses and necropsy findings.
  • To assess the diagnostic accuracy of clinical methods in differentiating dementia subtypes in the elderly.

Main Methods:

  • Detailed clinical assessment of 27 elderly dementia patients.
  • Clinical diagnosis of dementia cause.
  • Post-mortem neuropathological examination.
  • Analysis of diagnostic agreement between clinical and necropsy findings.

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Main Results:

  • Clinical diagnosis of dementia was not supported by necropsy findings in 11 out of 27 cases.
  • Alzheimer's disease was overdiagnosed clinically (13 cases), with only six confirmed neuropathologically.
  • Cranial computed tomography and Hachinski score did not reliably distinguish between Alzheimer's disease and multi-infarct dementia in this cohort.

Conclusions:

  • Neuropathological examination is essential for precise dementia diagnosis.
  • Clinical diagnostic methods have limitations in differentiating dementia subtypes in the elderly.
  • Further research into improved diagnostic tools for dementia is warranted.