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Microlissencephaly: a heterogeneous malformation of cortical development
A J Barkovich1, D M Ferriero, R M Barr
1Faculté de Médicine Xavier-Bichat (Université de Paris VII), Hôpital Robert-Debré, France.
Abstract:
We report the neonatal courses, early postnatal development, and neuroimaging findings of 17 patients with marked microcephaly and simplified cerebral gyral patterns, a condition that we call microlissencephaly. Retrospective analyses of the clinicoradiologic features of these patients allowed segregation of the patients into 5 distinct groups with varying outcomes. The apparent discreteness of these groups suggests multiple etiologies of this malformation, although there appears to be a strong genetic component with probable autosomal recessive inheritance. Utilizing the neonatal course and neuroradiologic features of these infants allows classification of specific subsets, which may be useful to predict outcome.
Insights
We identified microlissencephaly, a condition with severe microcephaly and simplified gyral patterns, in 17 infants. Clinicoradiologic analysis revealed 5 distinct groups, suggesting varied causes and potential for outcome prediction.
Area of Science:
- Neuroscience
- Genetics
- Pediatrics
Background:
- Microlissencephaly is characterized by severe microcephaly and simplified cerebral gyral patterns.
- Understanding its diverse clinical and neuroimaging features is crucial for diagnosis and prognosis.
Purpose of the Study:
- To describe the neonatal course, development, and neuroimaging findings in patients with microlissencephaly.
- To classify patients into distinct groups based on clinicoradiologic features to aid in outcome prediction.
Main Methods:
- Retrospective analysis of 17 patients with microlissencephaly.
- Evaluation of neonatal clinical data and neuroimaging findings.
- Segregation of patients into clinically and radiologically distinct groups.
Main Results:
- Identified 17 patients with marked microcephaly and simplified gyral patterns (microlissencephaly).
- Classified patients into 5 distinct groups with varying clinical outcomes.
- Observed features suggesting multiple etiologies and a probable autosomal recessive inheritance pattern.
Conclusions:
- Microlissencephaly likely results from multiple etiologies, with a strong genetic component.
- Classification based on neonatal course and neuroimaging may predict patient outcomes.
- Further research into specific genetic factors is warranted.