Abstract
IntroductionProton magnetic resonance spectroscopy (MRS) and diffusion tensor imaging (DTI) yield different parameters for characterizing the evolution of a demyelinating white matter disease. The purpose was to elucidate biochemical and microstructural changes in Balo’s concentric sclerosis lesions and to correlate the findings with the clinical course.MethodsLocalized short-echo time MRS and DTI were performed over 6 years in a left occipital lesion of a female patient (age at onset 13.8 years) with Balo’s concentric sclerosis. A right homonym hemianopsia persisted.ResultsMetabolite patterns were in line with initial active demyelination followed by gliosis and partial recovery of neuroaxonal metabolites. Fractional anisotropy and mean diffusivity of tissue water remained severely altered. Fiber tracking confirmed a disruption in the geniculo-calcarine tract as well as involvement of the corpus callosum.ConclusionMRS and DTI depict complementary parameters, but DTI seems to correlate better with clinical symptoms.
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