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[Cerebral arteriopathy with subcortical infarctions and leukoencephalopathy with dominant autosomal inheritance
C Marrero Falcón1, E Díez Tejedor, J Arpa Gutiérrez
1Servicio de Neurología, Hospital Universitario La Paz, Universidad Autónoma, Madrid.
Insights
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) histopathology reveals characteristic arteriopathy. These findings enhance understanding of CADASIL pathogenesis and diagnosis.
Area of Science:
- Neuropathology
- Vascular Neurology
- Genetics
Context:
- Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a genetic condition causing recurrent strokes and dementia.
- While genetic and neuroimaging features are known, histopathological studies are limited.
Purpose:
- To investigate the histopathological findings in cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL).
Summary:
- Studied two families with autosomal dominant inheritance over four generations, including clinical, imaging, genetic analysis, and post-mortem/biopsy tissue examination.
- Histopathology revealed a distinctive arteriopathy with granular degeneration of the medial sheath and ballooned smooth muscle cells in affected small arteries.
- Clinical presentation included ischemic attacks, headaches, and subcortical dementia, typically without vascular risk factors, with onset between 40-50 years.
Impact:
- Provides crucial histopathological insights into CADASIL, aiding in a deeper understanding of its disease mechanisms.
- Identifies characteristic arteriopathy features that may improve diagnostic accuracy for CADASIL.
Objective:
The cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is characterized by the recurrence of subcortical infarcts leading to dementia. It is known the genetic and neuroimaging findings, but there are few studies about its histopathology. Our objective had been to study the pathological findings in this arteriopathy.
Subjects And Methods:
We studied two families spreading over four generations. We performed a detailed clinical history, laboratory investigations, neuroimaging study and genetic analysis. Two brain biopsies and one autopsy were done in patients from the two families.
Results:
Eight affected members, with autosomal dominant inheritance. Age at onset was between 40 and 50 years. This was characterized clinically by recurrent ischemic attacks, headache and subcortical dementia without vascular risk factors. Histopathological findings showed an arteriopathy characterized by a slightly basophilic small arterial granular degeneration of the medial sheath associated with the presence of ballooned smooth muscle cells with clear cytoplasm.
Conclusion:
The histopathological findings of CADASIL show a characteristic arteriopathy that allow a better understanding of its pathogenesis and could contribute for its diagnosis.