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Longitudinal MRI in multiple sclerosis: correlation between disability and lesion burden
S J Khoury1, C R Guttmann, E J Orav
1Center for Neurologic Diseases, Brigham and Women's Hospital, Boston, MA.
Abstract:
We followed 18 multiple sclerosis patients clinically and with repeated brain MRIs with and without gadolinium for over 1 year. Clinical evaluations included scoring on the Kurtzke Expanded Disability Status Scale (EDSS) and the Ambulation Index (AI) scale. There was a significant correlation between the change in EDSS or AI and the change in number of lesions on MRI and between cumulative number of lesions on MRI and cumulative change in EDSS or AI. Our findings support the validity of MRI as a measure of clinical activity and potentially as an objective quantitative outcome measure for assessing response to therapy.
Insights
Magnetic Resonance Imaging (MRI) effectively tracks multiple sclerosis (MS) disease activity. Brain MRI lesion counts correlate with clinical disability scores, supporting its use in therapy assessment.
Area of Science:
- Neuroscience
- Radiology
- Clinical Neurology
Background:
- Multiple Sclerosis (MS) is a chronic neurological disease characterized by demyelination and axonal damage.
- Assessing disease activity and treatment response in MS often relies on clinical evaluations, which can be subjective.
- Objective, quantitative measures are needed to complement clinical assessments in MS research and patient management.
Purpose of the Study:
- To investigate the correlation between brain Magnetic Resonance Imaging (MRI) findings and clinical disability in multiple sclerosis patients.
- To evaluate the utility of MRI as an objective measure of clinical activity in multiple sclerosis.
- To determine if MRI can serve as a quantitative outcome measure for assessing therapeutic response in MS.
Main Methods:
- Longitudinal study of 18 multiple sclerosis patients over one year.
- Clinical assessments included Kurtzke Expanded Disability Status Scale (EDSS) and Ambulation Index (AI) scoring.
- Repeated brain MRI scans were performed, with and without gadolinium contrast, to quantify lesion load.
Main Results:
- A significant positive correlation was observed between changes in EDSS/AI scores and the change in the number of MRI lesions.
- Cumulative lesion counts on MRI showed a significant correlation with the cumulative changes in EDSS and AI.
- These findings indicate a strong relationship between MRI-detected disease activity and clinical progression in MS.
Conclusions:
- Brain MRI, including lesion quantification, is a valid measure of clinical activity in multiple sclerosis.
- MRI has the potential to serve as an objective, quantitative outcome measure for evaluating treatment efficacy in MS.
- This study supports the integration of advanced neuroimaging techniques into the comprehensive management of multiple sclerosis.
