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Tuesday, January 26, 2010

Early MRI in optic neuritis: the risk for clinically definite multiple sclerosis

Info provided by Karen D in South Florida:

First Published Jan 20, 2010

MRI brain lesions at presentation with optic neuritis (ON) increase the risk for developing clinically definite (CD) multiple sclerosis (MS). More detailed early MRI findings may improve prediction of conversion.

The objectives of this study were to investigate the influence of number, location and activity of lesions at presentation, new lesions at early follow-up and non-lesion MRI measures on conversion from optic neuritis (ON) to CDMS.

142/143 ON patients, prospectively recruited into a serial MRI and clinical follow-up study, were followed-up at least once. Cox regression analysis determined independent early MRI predictors of time to CDMS from: (i) baseline lesion number, location and activity measures, (ii) three-month lesion activity measures and (iii)brain atrophy, magnetization transfer ratio and spectroscopy measures.

114/142 (80%) had abnormal baseline brain or cord MRI. 57 (40%) developed CDMS (median of 16 months from clinically isolated syndrome onset). Median follow-up of the non-converters was 62 months. Multivariate analysis of baseline parameters revealed gender, periventricular and gadolinium-enhancing lesions as independent predictors of CDMS. Considering both scans together, gender, baseline periventricular and new T2 lesions at follow-up remained significant (hazard ratios 2.1, 2.4 and 4.9, respectively). No non-conventional measure predicted CDMS.

It was concluded that new T2 lesions on an early follow-up scan were the strongest independent predictor of CDMS.

Multiple Sclerosis 2010, doi:10.1177/1352458509353650

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