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Abstract #4347

Deep grey matter iron deposition and brain atrophy in early multiple sclerosis: a longitudinal study

Matthew P Quinn 1,2 , Joseph S Gati 1 , L Martyn Klassen 1 , Marcelo Kremenchutzky 3 , and Ravi S Menon 1,2

1 Centre for Functional and Metabolic Mapping, Robarts Research Institute, Western University, London, Ontario, Canada, 2 Department of Medical Biophysics, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada, 3 Department of Clinical Neurological Sciences, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada

A cohort of patients with clinically isolated syndromes suggestive of early MS and a cohort of age- and sex-matched healthy controls were followed for 12 to 20 months with imaging every 4 months. Rates of iron accumulation (R2*) in grey matter nuclei as well as rates of brain volume loss were compared between groups. Patients had increased iron accumulation in putamen and thalamus, as well as significantly increased brain volume loss. Thalamic iron measurements were significantly associated with brain volume percentage change after correction for age and time on-study. These results suggest iron deposition and atrophy occur in early MS.

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