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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
Summary
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.
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.