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Cerebellar dysgenesis in infants and children: an experience of 22 cases
1Department of Pediatrics, Taichung Veterans General Hospital, Taiwan, R.O.C.
Insights
Cerebellar dysgenesis in 22 cases showed varied outcomes, with isolated cerebellar hypoplasia faring better than complex cases. Magnetic resonance imaging (MRI) is crucial for diagnosing associated supratentorial brain dysgenesis, especially in microcephaly.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Medical Imaging
Background:
- Cerebellar dysgenesis encompasses a spectrum of congenital brain malformations.
- Accurate diagnosis and outcome prediction are critical for affected children.
- Understanding associated anomalies is key to comprehensive patient management.
Purpose of the Study:
- To analyze the clinical presentation and outcomes of 22 cases of cerebellar dysgenesis.
- To evaluate the utility of neuroimaging in identifying associated brain malformations.
- To assess the predictive value of a proposed clinical classification system.
Main Methods:
- Retrospective review of 22 cases with cerebellar dysgenesis diagnosed over 10 years.
- Utilized brain sonogram, computed tomography (CT), and magnetic resonance imaging (MRI).
- Correlated neuroimaging findings with clinical presentation, genetic analysis, and neurological outcomes.
Main Results:
- 22 cases (10 male, 12 female) diagnosed with cerebellar dysgenesis.
- Seven cases presented with isolated cerebellar hypoplasia; 15 had complex malformations, often involving supratentorial structures and the corpus callosum.
- Severe psychomotor retardation was common; isolated cerebellar hypoplasia had a better neurological outcome than complicated cases. Six cases had chromosomal anomalies.
Conclusions:
- Cerebellar dysgenesis presents with diverse neuroimaging findings and clinical outcomes.
- MRI is recommended for microcephaly to detect supratentorial anomalies, with a median sagittal view being essential.
- The proposed clinical classification aids in predicting patient outcomes.
Abstract:
There were a total of 22 cases of cerebellar dysgenesis documented by brain sonogram, and/or brain computer-tomography scan, and/or brain magnetic resonance imaging (MRI) in our department over the past 10 years. There were ten males and twelve females. The mean age at diagnosis was 5.79 months. The follow-up period ranged from 2 days to 132 months. Seven cases were suspected upon prenatal examination. Three cases presented with isolated cerebellar hypoplasia, one with Dandy- Walker malformation and three with Joubert syndrome. Seven cases presented with cerebellar dysgenesis complicated with supratentorial brain dysgenesis. Among them, three had vermis hypoplasia with hypoplasia of the corpus callosum, 1 had vermis hypoplasia with holoprosencephaly, 1 had cerebellar hypoplasia with lissencephaly and hypoplasia of corpus callosum, 1 had vermis hypoplasia, agenesis of the corpus callosum and pachygyria, and 1 had cerebellar hypoplasia, hypoplasia of corpus callosum and midline cystic malformation. They all showed severe psychomotor retardation. Six cases showed chromosome anomalies. The neurological outcome for cases with isolated cerebellar hypoplasia was better than the outcome of the complicated cases. MRI is recommended for patients with microcephaly to check for the possibility of combined supratentorial brain dysgenesis. When performing MRI, a median sagittal view should be included. A classification for clinical approach was presented at the same time. In this retrospective study, this classification seemed to have benefits in prediction of clinical outcomes.