Neuroimaging features of the nervous system in young children with epileptic encephalopathies according to MR-tractography
DOI:
https://doi.org/10.15574/SP.2024.138.41Keywords:
children, epileptic encephalopathies, neurodevelopmental disorders, cognitive and behavioral disorders, epileptic seizures, structural changes in the brain, magnetic resonance imaging, tractographyAbstract
The aim is to analyze neuroimaging changes in the nervous system of children of an early and preschool age with epileptic encephalopathies (EE) according to MR-tractography to improve the diagnosis of these conditions.
Materials and methods. 157 children aged 0 to 6 years with EE, epileptiform and developmental encephalopathies (DEE) were examined. The study included MR-tractography using a 3 Tesla MR scanner.
Fractional anisotropy (FA) and average diffusion coefficient (ADC) were determined in Broca's and Wernicke's areas, left arcuate tract, both uncinate tracts, corpus callosum and thalamus. The examined children were divided into 3 groups: I - 75 children with EE, with the onset of seizures before 1 year of age; II - 44 children with EE, with the onset of seizures at the age of 1-3 years; III - 38 children with DEE. Differences between groups were assessed using the Kruskal-Wallis test and Pearson's Chi-square (χ²) test.
Results. In children with EE from groups I and II, there was a significant decrease in FA and an increase in ADC in the areas of both language centers and the right uncinate tract in comparison with children of group III (p<0.05). In the group I with EE, there was a significant decrease in FA in the left uncinate tract, knee and trunk of the MT in comparison with the groups II and III of children (p<0.05).
It was found that more than 60% of children from group I had destruction of the fibers of the arcuate tract and in the area of one of the speech centers, and 70% had hypoplasia and destruction of the left uncinate tract. In the children of group II with EE, hypoplasia of the anterior (63.6%) and posterior (65.9%) parts of the arcuate tract and the right uncinate tract (81.8%) was detected. Among children from group III, more than 60% had an abnormal location of Broca's speech center, and more than 70 % had an abnormal location of Wernicke's center, almost 80 % had an abnormal location of the left uncinate tract.
Conclusions. It was found that in children with EE and DEE, according to MR tractography, there is a decrease in FA indicators and an increase in ADC in all studied structures (arcuate and uncinate tract, corpus callosum, thalamus) in comparison with the reference values given in the scientific literature. The detected changes indicate a violation of the structural integrity of the white matter in Broca's and Wernicke's centers and associative pathways, which will lead to the optimization of early diagnosis and prognosis of consequences in children with EE and DEE.
The study was carried out in accordance with the principles of the Declaration of Helsinki. The study protocol was approved by the Local Ethics Committees of the institutions indicated in the work. The informed consent of the children's parents was obtained for conducting the research.
No conflict of interest was declared by the authors.
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