Accumulation of hypointense lesions ('black holes') on T1 spin-echo MRI correlates with disease progression in multiple sclerosis

L. Truyen, J. H.T.M. Van Waesberghe, M. A.A. Van Walderveen, B. W. Van Oosten, C. H. Polman, O. R. Hommes, H. J.A. Adèr, F. Barkhof

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MRI findings are increasingly used as outcome measures in therapeutic trials in MS. The discrepancy between the extent of the lesions on conventional T2 images and the clinical condition of the patient is one of the problems encountered in such studies. This clinical-radiological paradox prevents the use of MRI data as surrogate markers of disability in MS. A recent pilot study suggested a relationship between hypointense lesions on T1 MRI and disability. To assess in more detail the correlation of changes in hypointense lesion lead on T1-weighted spin-echo MR images ('black holes') with changes in disability in MS, we studied 46 patients with clinically definite MS at baseline and after a median follow-up of 40 months. There was a significant correlation between baseline disability and hypointense lesion lead (Spearman rank correlation coefficient [SRCC] = 0.46, p = 0.001). In secondary progressive patients, the rate of accumulation of these 'black holes' was significantly related to progression rate (SRCC = 0.81, p < 0.0001). We speculate that the appearance of hypointense lesions is the MRI equivalent of a failure of remission. Overall, T1 lesion lead measurements correlated better with clinical assessments than T2 lesion lead measurements. Quantification of hypointense lesion lead on T1-weighted spin- echo MRI helps to resolve the clinical-radiological paradox between disability and MRI and has the potential to be a surrogate marker of disability in MS.

Original languageEnglish
Pages (from-to)1469-1476
Number of pages8
Issue number6
Publication statusPublished - 1 Jan 1996

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