Longitudinal Brain Volume Findings in an Outpatient Practice of Young People with MS (P11-3.001)

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<h3>Objective:</h3> To assess in an outpatient setting the application of volumetrics with brain MRI among young people with multiple sclerosis (MS). <h3>Background:</h3> Research on brain atrophy in MS has illuminated how inflammation and neurodegenerative processes lead to cognitive and neurologic declines. However, brain volume assessment is rarely used in routine practice. Here, we examined predominantly pediatric onset MS and some younger adult-onset MS patients who underwent routine brain MRI including volumetrics. Our goal was to assess the impact of brain volume change on clinical outcomes including SDMT in this relatively young and stable MS subset. <h3>Design/Methods:</h3> 77 patients with pediatric or adult onset RRMS or CIS, 31 years of age or younger, were evaluated with at least two MRI studies. Volume data was computed on MRI images with icobrain ms software, compared to age- and sex-related norms and adjusted for differences across the various Siemens 3T scanners. Changes in volumes of whole brain (WB), white matter (WM), grey matter (GM), lateral ventricles (LV), and thalamus were calculated as an average annualized percent brain volume change per year. <h3>Results:</h3> The mean patient age was 21.6 years (range 12–31); 70% were female. The annual mean decrease of WB volume: −0.473%, WM: −0.390%, GM: −0.517%, thalamus: −0.552%, and annual LV volume increase: 1.78%. A total of 32.5% of patients had an annual decrease in GM volume &gt;0.8% (the 90% threshold for measurement error). 29.9% of patients had LV volumes increase &gt;3.5%. Whole brain volume loss and lateral ventricle increase was significantly correlated, r=−0.34 (p=0.002). Clinical and demographic features between those whose brain volume declined and those whose brain volumes remained stable will be presented. <h3>Conclusions:</h3> Quantitative MRI is a useful technique which has only begun to be incorporated into clinical practice. A proportion of young otherwise stable patients with RRMS show brain volume loss under computer-assisted analyses. <b>Disclosure:</b> Dr. O’Neill has nothing to disclose. Dr. Couvreur has received personal compensation in the range of $10,000-$49,999 for serving as a Intern Clinical application specialist at icometrix with The Prince Albert Fund. Dr. Hu has nothing to disclose. Mr. Zhang has nothing to disclose. Ms. Pehel has nothing to disclose. Ms. Sosa has nothing to disclose. Ms. Fade has nothing to disclose. Elayne Feld has nothing to disclose. Dr. Chen has received personal compensation for serving as an employee of icometrix. Dr. De Barros has received personal compensation for serving as an employee of Icometrix. Thibo Billiet has received personal compensation for serving as an employee of icometrix. Annemie Ribbens, 9599 has received personal compensation for serving as an employee of icometrix. Annemie Ribbens, 9599 has stock in icometrix. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Janssen. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Gerson Lerhman. Dr. Krupp has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for medscape. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for NeuroLive. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Eisai. Dr. Krupp has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Biogen. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as an officer or member of the Board of Directors for Cleveland Clinic. Dr. Krupp has received personal compensation in the range of $500-$4,999 for serving as an Expert Witness for MCIC. The institution of Dr. Krupp has received research support from Biogen. The institution of Dr. Krupp has received research support from National Multiple Sclerosis Society. Dr. Krupp has received intellectual property interests from a discovery or technology relating to health care.