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Clinical phenotypes in autopsy-confirmed Pick disease.
O Piguet1, G M Halliday, W G J Reid
1Neuroscience Research Australia, Sydney, Australia. o.piguet@neura.edu.au
Neurology
|January 19, 2011
Summary
Early clinical features in Pick disease can predict disease duration. Behavioral variant frontotemporal dementia (bvFTD) cases progressed faster than language variant frontotemporal dementia (lvFTD) cases.
Area of Science:
- Neurology
- Neuroscience
- Pathology
Background:
- Frontotemporal lobar degeneration (FTLD) neuropathology is variable, with uncertain clinicopathologic correlations.
- Pick disease, a subtype of FTLD, involves abnormal tau protein deposits (Pick bodies).
- Understanding Pick disease progression is crucial for developing targeted treatments.
Purpose of the Study:
- To enhance the sensitivity of clinicopathologic correlations in Pick disease.
- To identify clinical features that predict disease progression in Pick disease.
- To analyze the relationship between clinical presentation and neuropathology.
Main Methods:
- Retrospective analysis of 21 neuropathologically confirmed Pick disease cases.
- Inclusion of cases with sufficient clinical data from two specialist centers (1998-2007).
- Evaluation of early presenting clinical features and their correlation with disease duration and pathology.
Main Results:
- 62% of cases were initially diagnosed with behavioral variant frontotemporal dementia (bvFTD), 38% with language variant frontotemporal dementia (lvFTD).
- bvFTD patients had a shorter average disease duration (7 years) compared to lvFTD patients (12 years).
- Fewer Pick bodies were observed in bvFTD cases; both groups showed neuronal loss in the dentate gyrus over time.
Conclusions:
- The pathological course of Pick disease is not uniform.
- Early clinical presentation, specifically bvFTD versus lvFTD, can estimate disease duration.
- These findings are relevant for developing pathology-specific treatments for FTLD.
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