Diffusion tensor analysis of pediatric multiple sclerosis and clinically isolated syndromes

Area of Science:

• Neuroimaging
• Pediatric Neurology
• Multiple Sclerosis Research

Background:

• Diffusion Tensor Imaging (DTI) detects white matter abnormalities in adult and pediatric Multiple Sclerosis (MS).
• The presence of DTI abnormalities at the initial presentation of MS in children and their predictive value for disease progression remain unclear.

Purpose of the Study:

• To investigate DTI abnormalities in children experiencing their first MS attack or clinically isolated syndrome (CIS).
• To determine if early DTI features can predict the future development of MS in pediatric patients.

Main Methods:

• DTI, including mean Apparent Diffusion Coefficient (ADC) and Fractional Anisotropy (FA) values, was analyzed in major white matter tracts and normal-appearing white matter (NAWM).
• Regions of interest were placed on color FA maps and T2-weighted images to analyze 20 children with MS, 27 children with CIS, and control groups.
• Statistical analyses included t-tests for group comparisons and logistic regression to assess predictive values of DTI and conventional MRI measures for CIS to MS conversion.

Main Results:

• Pediatric MS patients exhibited significantly higher mean ADC and lower mean FA in white matter pathways and NAWM compared to controls.
• No significant differences in white matter ADC or FA values were found between children with CIS and controls at baseline.
• DTI measures in white matter or NAWM did not significantly predict conversion from CIS to relapsing-remitting MS (RRMS) in univariate or multivariate models.

Conclusions:

• Significant anisotropic white matter abnormalities are present in the NAWM of major tracts in children with MS.
• Pediatric patients with CIS show no significant DTI changes compared to controls at the time of their first clinical event.
• DTI metrics did not predict conversion to MS, highlighting the period between CIS and MS onset as a potential window for preventing diffuse central nervous system damage and disability.