Quantitative MRI analysis in children with multiple sclerosis: a multicenter feasibility pilot study.
BACKGROUND
Pediatric multiple sclerosis (MS) is a rare disorder with significant consequences. Quantitative MRI measurements may provide significant insights, however multicenter collaborative studies are needed given the small numbers of subjects. The goal of this study is to demonstrate feasibility and evaluate lesion volume (LV) characteristics in a multicenter cohort of children with MS.


METHODS
A common MRI-scanning guideline was implemented at six member sites of the U.S. Network of Pediatric MS Centers of Excellence. We included in this study the first ten scans performed at each site on patients meeting the following inclusion criteria: pediatric RRMS within 3 years of disease onset, examination within 1 month of MRI and no steroids 1 month prior to MRI. We quantified T2 number, T2-LV and individual lesion size in a total of 53 MRIs passing quality control procedures and assessed gadolinium-enhancing lesion number and LV in 55 scans. We studied MRI measures according to demographic features including age, race, ethnicity and disability scores, controlling for disease duration and treatment duration using negative binomial regression and linear regression.


RESULTS
The mean number of T2 lesions was 24.30 ± 19.68 (range:1-113) and mean gadolinium-enhancing lesion count was 1.85 ± 5.84, (range:0-32). Individual lesion size ranged from 14.31 to 55750.60 mm3. Non-white subjects had higher T2-LV (unadjusted pT2-LV = 0.028; adjusted pT2-LV = 0.044), and maximal individual T2-LV (unadjusted pMax = 0.007; adjusted pMax = 0.011) than white patients. We also found a trend toward larger mean lesion size in males than females (p = 0.07).


CONCLUSIONS
Assessment of MRI lesion LV characteristics is feasible in a multicenter cohort of children with MS.
Tanuja
T
Chitnis
Charles R
CR
Guttmann
Alexander
A
Zaitsev
Alexander
A
Musallam
Bianca
B
Weinstock-Guttman
Ann
A
Yeh
Moses
M
Rodriguez
Jayne
J
Ness
Mark P
MP
Gorman
Brian C
BC
Healy
Nancy
N
Kuntz
Dorothee
D
Chabas
Jonathan B
JB
Strober
Emmanuelle
E
Waubant
Lauren
L
Krupp
Daniel
D
Pelletier
Bradley
B
Erickson
Niels
N
Bergsland
Robert
R
Zivadinov
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006233:Persons with Disabilities; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D009103:Multiple Sclerosis / Q000175:diagnosis*; D010865:Pilot Projects; D014481:United States