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Is monochorionic twinning a risk factor for focal cortical dysgenesis?
1Department of Neurology, Trondheim University Hospital, Norway.
Acta Neurologica Scandinavica
|July 13, 2000
Summary
Cortical dysgenesis can occur discordantly in identical twins, potentially linked to vascular events in early fetal development. This case highlights the brain
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Cortical dysgenesis is linked to genetic and acquired factors.
- Monochorionic twinning may induce fetal developmental abnormalities via feto-fetal transfusions.
- Vascular instability in early fetal life is a proposed mechanism.
Observation:
- A case of discordant cortical malformation in monozygotic, monochorionic twins is presented.
- One twin had a grey matter heterotopion and arachnoid cyst.
- No significant focal cognitive deficits were observed, but overall performance was slightly reduced in the affected twin.
Findings:
- Monozygotic, monochorionic twins exhibited discordant cortical dysgenesis.
- Mild generalized cognitive impact suggests fetal brain plasticity.
- Monochorionic twinning's unique embryology may increase early vascular event risk.
Implications:
- This case offers insights into the consequences of focal cortical dysgenesis.
- The vanishing twin syndrome is hypothesized as an etiological factor for cortical malformations.
- Potential implications extend to singleton pregnancies, suggesting vascular events as a cause.