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Related Experiment Videos

Dementia with Lewy bodies.

Ian G McKeith1, David J Burn, Clive G Ballard

  • 1Institute for Ageing and Health, Wolfson Research Centre, Newcastle General Hospital, Newcastle, UK.

Seminars in Clinical Neuropsychiatry
|February 5, 2003
PubMed
Summary

Dementia with Lewy bodies (DLB) shares features with Parkinson's and Alzheimer's diseases. Accurate DLB diagnosis is crucial due to drug sensitivities and potential treatment benefits.

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Area of Science:

  • Neurology
  • Neuroscience
  • Pathology

Background:

  • Dementia with Lewy bodies (DLB) is a primary neurodegenerative dementia.
  • DLB shares clinical and pathological features with Parkinson's disease (PD) and Alzheimer's disease (AD).
  • DLB is the second most common degenerative dementia after AD, affecting 15-20% of elderly dementia cases.

Purpose of the Study:

  • To summarize recent findings on the clinical features, diagnosis, investigation, neuropathology, neurochemistry, and genetics of DLB.
  • To highlight the neurobiological links between DLB, PD, and other synucleinopathies.
  • To assess the accuracy of current diagnostic criteria and identify areas for improvement.

Main Methods:

  • Review of recent findings on DLB clinical features, diagnosis, and investigation.

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  • Analysis of neuropathological studies using anti-ubiquitin and alpha-synuclein antibodies.
  • Evaluation of validation studies for clinical diagnostic criteria of DLB.

    • Main Results:

    • Cortical Lewy bodies (LB) and Lewy neurites (LNs) correlate significantly with cognitive decline in DLB.
    • Current DLB diagnostic criteria show high specificity (mean 92%) but low sensitivity (mean 49%).
    • Structural MRI (medial temporal lobe volume) and SPECT (dopamine transporter) are reliable DLB biomarkers.

    Conclusions:

    • Improved methods for DLB case detection are needed.
    • Accurate DLB diagnosis is clinically significant due to drug sensitivities and potential treatment responses.
    • Dementia in late-stage PD shares characteristics with DLB.