More MS news articles for Jan 2002

A Longitudinal Study of Abnormalities on MRI and Disability from Multiple Sclerosis

http://content.nejm.org/cgi/content/short/346/3/158

January 17, 2002
Volume 346:158-164 Number 3
Peter A. Brex, M.D., Olga Ciccarelli, M.D., Jonathon I. O'Riordan, M.D., Michael Sailer, M.D., Alan J. Thompson, M.D., and David H. Miller, M.D.

ABSTRACT

Background

In patients with isolated syndromes that are clinically suggestive of multiple sclerosis, such as optic neuritis or brain-stem or spinal cord syndromes, the presence of lesions as determined by T2-weighted magnetic resonance imaging (MRI) of the brain increases the likelihood that multiple sclerosis will develop. We sought to determine the relation between early lesion volume, changes in volume, and long-term disability.

Methods

Seventy-one patients in a serial MRI study of patients with isolated syndromes were reassessed after a mean of 14.1 years. Disability was measured with the use of Kurtzke's Expanded Disability Status Scale (EDSS; possible range, 0 to 10, with a higher score indicating a greater degree of disability).

Results

Clinically definite multiple sclerosis developed in 44 of the 50 patients (88 percent) with abnormal results on MRI at presentation and in 4 of 21 patients (19 percent) with normal results on MRI. The median EDSS score at follow-up for those with multiple sclerosis was 3.25 (range, 0 to 10); 31 percent had an EDSS score of 6 or more (including three patients whose deaths were due to multiple sclerosis). The EDSS score at 14 years correlated moderately with lesion volume on MRI at 5 years (r=0.60) and with the increase in lesion volume over the first 5 years (r=0.61).

Conclusions

In patients who first present with isolated syndromes suggestive of multiple sclerosis, the increases in the volume of the lesions seen on magnetic resonance imaging of the brain in the first five years correlate with the degree of long-term disability from multiple sclerosis. This relation is only moderate, so the volume of the lesions alone may not be an adequate basis for decisions about the use of disease-modifying treatment.

Source Information

From the Nuclear Magnetic Resonance Research Unit, Institute of Neurology, Queen Sq., London (P.A.B., O.C., A.J.T., D.H.M.); the Tayside Multiple Sclerosis Research Unit, Ninewells Hospital, Dundee, United Kingdom (J.I.O.); and Otto-von-Guericke Universität, Magdeburg, Germany (M.S.).
 

Copyright © 2002 Massachusetts Medical Society