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Microstructural callosal abnormalities in normal-appearing brain of children with developmental delay detected with
Xiao-Qi Ding1, Yimeng Sun, Bernd Kruse
1Institute of Diagnostic and Interventional Neuroradiology, Hannover Medical School, Carl-Neuberg-Str.1, 30625, Hannover, Germany. Ding.Xiaoqi@mh-hannover.de
European Radiology
|February 3, 2009
Summary
Children with developmental delay show corpus callosum (CC) microstructural abnormalities on advanced MRI, even with normal conventional scans. These findings reveal subtle brain differences impacting development.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Radiology
Background:
- Callosal fibres are crucial for psychomotor and cognitive functions.
- Developmental delay in children can have various underlying causes.
- Conventional MRI may not detect all brain abnormalities in pediatric developmental delay.
Purpose of the Study:
- To investigate microstructural abnormalities of the corpus callosum (CC) in children with developmental delay.
- To compare CC microstructural metrics between pediatric patients and healthy controls.
- To determine if advanced MRI techniques can identify abnormalities missed by conventional MRI.
Main Methods:
- Seventeen pediatric patients (1-9 years) with developmental delay and normal conventional MRI were studied.
- Quantitative T2 and fractional anisotropy (FA) values were measured in the CC.
- Fibre tracking, volumetric determination, and fibre density calculations were performed.
Main Results:
- Patients showed elevated T2 relaxation times and reduced FA values at the genu of the CC.
- Reduced fibre numbers and volumes in the CC were observed in patients older than 5 years.
- These microstructural differences were evident despite normal conventional MRI findings.
Conclusions:
- Microstructural abnormalities in the corpus callosum are present in pediatric patients with developmental delay.
- Advanced MRI techniques like diffusion tensor imaging and fibre tracking are sensitive to subtle CC changes.
- These findings highlight the importance of advanced neuroimaging in understanding developmental delay.
