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Pathology in primary progressive aphasia syndromes
Jennifer M Harris1, Matthew Jones
1Manchester Academic Health Sciences Centre, Cerebral Function Unit, Greater Manchester Neuroscience Centre, Salford Royal NHS Foundation Trust, Salford, UK.
Current Neurology and Neuroscience Reports
|June 23, 2014
Summary
Primary progressive aphasia (PPA) involves language disorders from neurodegeneration. Accurate classification is key for future treatments, though current subtypes show variable clinicopathological correlation.
Area of Science:
- Neurology
- Neuroscience
- Linguistics
Background:
- Primary progressive aphasia (PPA) is a neurodegenerative condition affecting language.
- Three main variants exist: nonfluent/agrammatic, semantic, and logopenic PPA.
- Accurate classification is crucial for developing targeted therapies.
Purpose of the Study:
- To review clinical and histopathological studies of PPA.
- To examine updated PPA classifications and their clinicopathological correlations.
- To highlight the challenges in matching PPA subtypes with underlying pathology.
Main Methods:
- Literature review of clinical and histopathological studies.
- Analysis of updated PPA classification systems.
- Assessment of the correspondence between PPA variants and their pathological substrates.
Main Results:
- Currently, no perfect one-to-one correlation exists between PPA subtypes and histopathology.
- The semantic variant shows the strongest clinicopathological correspondence.
- The logopenic variant exhibits the weakest clinicopathological correspondence.
Conclusions:
- Accurate clinicopathological correlation in PPA remains a challenge.
- The semantic variant is best understood pathologically among PPA subtypes.
- Future biomarkers are needed to improve diagnostic accuracy during life.
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