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Corticobasal ganglionic degeneration and progressive supranuclear palsy presenting with cognitive decline
C Bergeron1, A Davis, A E Lang
1Centre for Research in Neurodegenerative Diseases and Department of Pathology (Neuropathology), University of Toronto, The Toronto Hospital, Ontario, Canada. c.bergeron@utoronto.ca
Brain Pathology (Zurich, Switzerland)
|April 18, 1998
Summary
Corticobasal ganglionic degeneration (CBGD) can present as dementia, distinct from other dementias through tau deposits. Progressive supranuclear palsy (PSP) rarely causes dementia, but must be differentiated from CBGD.
Area of Science:
- Neurodegenerative diseases
- Neuropathology
- Tauopathies
Background:
- Corticobasal ganglionic degeneration (CBGD) and progressive supranuclear palsy (PSP) were initially recognized as primarily motor disorders.
- Recent studies reveal CBGD as a distinct entity often presenting with dementia or aphasia.
- While sharing some pathological features with other non-Alzheimer, non-Lewy body dementias, CBGD is distinguishable by specific tau deposit patterns.
Purpose of the Study:
- To differentiate Corticobasal ganglionic degeneration (CBGD) from other neurodegenerative conditions.
- To highlight the diagnostic challenges in distinguishing CBGD from atypical presentations of Progressive Supranuclear Palsy (PSP) and familial tangle-only dementia.
Main Methods:
- Histological examination of brain tissue.
- Analysis of tau immunodeposit patterns.
- Comparative neuropathological assessment.
Main Results:
- Corticobasal ganglionic degeneration (CBGD) is a distinct histological entity.
- CBGD can manifest as dementia or aphasia, differing from typical motor presentations.
- Distinctive tau pathology aids in differentiating CBGD from Pick's disease and frontotemporal dementia.
- Progressive Supranuclear Palsy (PSP) rarely presents with significant dementia or behavioral changes.
Conclusions:
- Corticobasal ganglionic degeneration (CBGD) is a unique clinicopathological entity.
- Accurate diagnosis of CBGD relies on characteristic tau pathology and clinical presentation.
- Atypical presentations of Progressive Supranuclear Palsy (PSP) require careful exclusion of CBGD and familial tangle-only dementia.