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Vascular dysplasia in Down syndrome: a possible relationship to moyamoya disease
1Department of Pathology, University of Toronto, Ontario, Canada.
Insights
Children with Down syndrome (DS) may have a higher risk of moyamoya disease due to underlying vascular development abnormalities. This case highlights cerebral infarction linked to DS-associated vascular defects.
Area of Science:
- Neuropathology
- Vascular Biology
- Pediatric Neurology
Background:
- Down syndrome (DS) is associated with an increased incidence of moyamoya disease.
- Congenital heart disease is common in DS, suggesting systemic vascular development issues.
Observation:
- A neuropathological examination of a child with DS revealed a large cerebral infarction.
- Vascular abnormalities in the circle of Willis included hypoplasia and microscopic changes like intimal thickening.
Findings:
- The observed cerebral infarction in a DS patient was linked to structural vascular defects in the circle of Willis.
- Microscopic findings suggest a vulnerability to factors contributing to moyamoya disease pathogenesis.
Implications:
- These findings suggest a potential link between DS, vascular abnormalities, and moyamoya disease.
- Further research is needed to understand the pathogenesis and improve clinical management for children with DS and vascular risks.
Abstract:
The brain of a child with Down syndrome (DS) and vascular abnormalities is described. Neuropathological examination showed a large cerebral infarction. In the circle of Willis there was hypoplasia of the left middle and posterior communicating cerebral arteries, and microscopically there was thickening of intima and focal disruption of internal elastica in some areas of the circle of Willis. Several reports suggest that the incidence of moyamoya disease is higher in children with DS than in other children. The high incidence of congenital heart disease in DS suggests an abnormality of vascular development that may manifest intracranially as a structural vascular defect, creating a vulnerability to unknown factors important in the pathogenesis of the moyamoya abnormality.