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Computed tomographic findings in progressive supranuclear palsy: correlation with clinical grade
S M Schonfeld1, L I Golbe, J I Sage
1Department of Radiology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Brunswick 08903.
Summary
Computed tomography (CT) reveals progressive brain changes in progressive supranuclear palsy (PSP). Early CT findings like reduced midbrain diameter can suggest PSP diagnosis before severe clinical symptoms manifest.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Progressive supranuclear palsy (PSP) is a neurodegenerative disease with characteristic clinical and radiological features.
- Accurate diagnosis of PSP is crucial for patient management and research.
Purpose of the Study:
- To correlate clinical severity of PSP with computed tomography (CT) findings.
- To evaluate the utility of CT in early PSP diagnosis.
Main Methods:
- Retrospective analysis of clinical data and CT scans from 17 PSP patients.
- Classification of patients into four grades based on disease severity and functional disability.
- Measurement of brain structure dimensions, including anteroposterior (AP) diameters of midbrain and pons.
Main Results:
- Early Grade 1 PSP showed decreased midbrain tegmentum AP diameter.
- Grade 2 PSP exhibited pontine and midbrain atrophy and quadrigeminal plate cistern dilatation.
- Advanced Grades 3-4 revealed aqueduct dilatation, enlarged ventricles, and temporal lobe atrophy.
- PSP patients had significantly smaller midbrain and pontine AP diameters compared to controls.
- Serial CT demonstrated progressive involution of pons/midbrain and third ventricle enlargement.
Conclusions:
- CT findings in PSP progress with clinical severity.
- CT can reveal suggestive signs of PSP even before classic clinical manifestations.
- Radiological changes, particularly midbrain and pontine atrophy, are key indicators in PSP diagnosis.