Why distinguishing Alzheimer disease from Lewy body dementia remains difficult
A review highlights overlapping brain changes and several cognitive domains to assess, without providing a validated diagnostic rule.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review suggests that distinguishing these dementias requires attention to memory, executive function, attention, visual and spatial abilities, and verbal fluency, alongside disease stage and severity. Brain shrinkage patterns appeared similar across several regions. The abstract identifies areas to investigate but does not show how accurately any particular test separates the diagnoses.
This summary uses only the abstract. It provides no diagnostic accuracy estimates, participant total or detailed account of study limitations, so it cannot establish a reliable diagnostic test.
What the review compared
Researchers synthesized 41 articles to compare cognitive symptoms with brain structure and function. The review sought both similarities and differences, making overlap between the diseases part of the result rather than a failed comparison.
A direction for research
The authors propose exploring language-related cognitive markers alongside brain changes. This is a research direction: the abstract does not name a marker with demonstrated diagnostic accuracy or explain how performance differs by disease stage.
The original publication
Neuropsychological differential diagnosis of Alzheimer's disease and Lewy body dementia: A systematic review.
Julio-Ramos T, Mora-Castelleto V, Foncea-González C et al.
Neurologia (Engl Ed) · 2025
- PubMed ID
- 41061799
- Record checked
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