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[CADASIL with minimal symptoms after 60 years]
A Mourad1, M Levasseur, M G Bousser
1Service de Neurologie CHG, Place du Général Leclerc, Orsay.
Revue Neurologique
|October 10, 2006
Summary
This study on Cerebral Autosomal-Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL) found that some older patients with Notch3 mutations may not develop dementia or disability, suggesting infarcts contribute to severity.
Area of Science:
- Neurology
- Genetics
- Vascular Biology
Background:
- Cerebral Autosomal-Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (CADASIL) is a hereditary condition.
- It typically causes progressive disability and dementia, usually manifesting around age 60.
Observation:
- Four patients over 60 with confirmed Notch3 mutations for CADASIL were studied.
- These patients did not exhibit dementia or significant disability.
- Three presented solely with transient neurological symptoms, and MRI showed extensive white matter hyperintensities with few lacunar infarcts.
Findings:
- The study identified a subset of older CADASIL patients with typical genetic profiles but lacking expected cognitive decline or physical impairment.
- Cerebral imaging revealed widespread white matter changes despite a low burden of lacunar infarcts.
Implications:
- These findings challenge the direct correlation between Notch3 mutations and severe clinical outcomes in all CADASIL patients.
- The rarity of infarcts in these cases suggests that clinical severity may not solely depend on infarct load.
- Further research is needed to understand the factors influencing CADASIL progression and clinical presentation in diverse patient groups.
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