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Agenesis of corpus callosum: clinical description and etiology
1Pediatric Neurology Clinic, Silesian School of Medicine, Katowice, Poland. sk@sk6.katowice.pl
Insights
Agenesis of the corpus callosum, a brain malformation, was found in 7 children. All patients had dysmorphic features and psychomotor retardation, with most experiencing seizures.
Area of Science:
- Neuroscience
- Genetics
- Pediatrics
Background:
- Structural defects of the central nervous system are diagnosed using magnetic resonance imaging (MRI).
- Agenesis of the corpus callosum (ACC) is a significant congenital brain malformation.
Purpose of the Study:
- To investigate the prevalence and potential etiologies of agenesis of the corpus callosum in children with central nervous system structural defects.
- To characterize the clinical features associated with ACC in this pediatric cohort.
Main Methods:
- Retrospective analysis of MRI scans from 135 children (3 months to 15 years) with CNS structural defects.
- Detailed review of etiological factors, clinical presentations, and neurological examinations for children diagnosed with ACC.
Main Results:
- Seven out of 135 children (5.2%) were diagnosed with agenesis of the corpus callosum.
- Identified etiologies included partial trisomy 13, partial duplication of chromosome 10, Aicardi syndrome, fetal intracranial bleeding, and a coexisting Dandy-Walker malformation suggesting genetic causes.
- All seven patients exhibited dysmorphic features and psychomotor retardation; six experienced epileptic seizures, and all had neurological abnormalities.
Conclusions:
- Agenesis of the corpus callosum is a notable finding in children with CNS structural defects.
- ACC presents with consistent clinical features including dysmorphism, psychomotor retardation, and neurological abnormalities, irrespective of its diverse etiology.
- The findings underscore the importance of thorough etiological investigation and clinical evaluation in pediatric ACC cases.
Abstract:
In 135 children (aged 3 months to 15 years) with structural defects of the central nervous system found on magnetic resonance imaging, agenesis of the corpus callosum was evident in 7. The etiology of agenesis of the corpus callosum has been established in four children: partial trisomy of chromosome 13, partial duplication of the long arm of chromosome 10, Aicardi's syndrome, and intracranial bleeding during the fetal period as a result of injury. Agenesis of the corpus callosum coexisted with a Dandy-Walker malformation in one other patient, which suggests a genetic etiology. In spite of these variable etiologies, dysmorphic features were identified in all seven patients, as was psychomotor retardation. Epileptic seizures had occurred in six patients, and all manifested abnormalities on neurologic examination.