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Differential lesion patterns in CADASIL and sporadic subcortical arteriosclerotic encephalopathy: MR imaging study
1Max-Planck-Institut für Psychiatrie, Kraepelinstrasse 10, 80804 Munich, Germany. auer@mpipsykl.mpg.de
Insights
Magnetic resonance imaging can differentiate cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) from sporadic subcortical arteriosclerotic encephalopathy (sSAE) using distinct white matter lesion patterns.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) and sporadic subcortical arteriosclerotic encephalopathy (sSAE) are distinct leukoencephalopathies.
- Differentiating these conditions is crucial for accurate diagnosis and management.
Purpose of the Study:
- To identify and differentiate specific magnetic resonance (MR) imaging lesion patterns between CADASIL and sSAE.
- To establish MR imaging criteria for distinguishing these two white matter disorders.
Main Methods:
- Comparison of T2-weighted and fluid-attenuated inversion-recovery MR images from 28 CADASIL patients and 24 sSAE patients.
- Utilized automated pixel-based group comparison with statistical parametric mapping and semiquantitative regional rating.
- Employed linear discriminant analysis for classification accuracy.
Main Results:
- CADASIL showed higher lesion scores in temporal and temporopolar white matter (WM).
- Statistical parametric mapping revealed more extensive bilateral anterior temporal and superior frontal WM involvement in CADASIL.
- Distinct signal reductions were observed in the dentate nucleus, cerebellar WM, crus cerebri, and thalamus in CADASIL.
- Lesions extended more frequently into arcuate fibers in CADASIL.
- Linear discriminant analysis achieved 96% classification accuracy, with temporopolar WM and arcuate fiber involvement being key discriminators.
Conclusions:
- MR imaging criteria can effectively differentiate CADASIL from sSAE based on lesion patterns.
- The study highlights the potential of automated image analysis in characterizing MR imaging lesion patterns.
- Findings provide insights into the pathophysiology of CADASIL and guide future research.
Purpose:
To differentiate lesion patterns in patients with cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) from those in patients with sporadic subcortical arteriosclerotic encephalopathy (sSAE).
Materials And Methods:
Magnetic resonance (MR; T2-weighted and fluid-attenuated inversion-recovery) images obtained in 28 patients with CADASIL were compared with images obtained in 24 patients with sSAE by using an automated pixel-based group comparison with statistical parametric mapping and regional semiquantitative rating.
Results:
Visual rating showed higher lesion scores for CADASIL in the temporal and temporopolar white matter (WM). Statistical parametric mapping group analysis independently revealed more extensive bilateral involvement of the anterior temporal and superior frontal WM in CADASIL. There were bilateral signal intensity reductions within the dentate nucleus, deep cerebellar WM, crus cerebri, and thalamus. Lesions extended remarkably more often into arcuate fibers in the temporopolar and paramedian superior frontal lobes in CADASIL. Linear discriminant analysis was used to classify 96% (50 of 52) of the cases correctly, with temporopolar WM and arcuate fiber involvement contributing most to the discrimination function.
Conclusion:
The presented MR imaging criteria are useful in the diagnostic work-up in patients with leukoencephalopathy and help to differentiate CADASIL from sSAE. The observed pattern of vulnerability in CADASIL suggests future directions for research in the pathophysiology of this disorder. In addition, the study demonstrates the potential of automated image analysis to explore MR imaging lesion patterns.