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Subcortical vascular cognitive impairment: similarities and differences with multiple sclerosis

Reinhold Schmidt1, Christian Enzinger, Stefan Ropele

  • 1Department of Neurology, Medical University Graz, Auenbruggerplatz 22, A-8036 Graz, Austria. reinhold.schmidt@meduni-graz.at

Journal of the Neurological Sciences
|April 22, 2006
PubMed

Insights

Subcortical vascular cognitive impairment and multiple sclerosis share similar white matter damage and cognitive effects. MRI shows comparable lesion progression, suggesting its use for monitoring both diseases.

Area of Science:

  • Neurology
  • Neuroimaging
  • Vascular Dementia Research

Background:

  • Subcortical vascular cognitive impairment involves lacunes and ischemic white matter damage, mimicking multiple sclerosis (MS) white matter abnormalities.
  • The progression rate of ischemic white matter lesions in vascular dementia closely resembles that seen in MS.
  • Cognitive deficits in both conditions are similar, partly due to frontal-subcortical circuit damage.

Purpose of the Study:

  • To explore the potential of MRI for monitoring disease activity in vascular dementia trials.
  • To compare white matter changes in cerebral small vessel disease (CSVD) and MS using advanced imaging techniques.
  • To investigate the extent of ischemic white matter damage in CSVD.

Main Methods:

  • Magnetization transfer imaging (MTI) was used to assess white matter integrity.
  • Comparison of MRI-based lesion progression rates between vascular dementia and multiple sclerosis.
  • Analysis of cognitive consequences and affected neuroanatomical structures.

Main Results:

  • Evidence suggests normal-appearing white matter is unaffected in CSVD, unlike in MS, based on MTI studies.
  • Ischemic white matter damage in CSVD may not extend as far as previously hypothesized based on conventional MRI.
  • Similarities in cognitive outcomes point to shared damage in frontal-subcortical circuits.

Conclusions:

  • MRI shows promise for monitoring disease progression in vascular dementia, similar to its use in multiple sclerosis.
  • Findings challenge the idea that ischemic white matter damage in CSVD is more widespread than visible on conventional MRI.
  • Shared neuroanatomical and neurochemical pathways support common therapeutic strategies, like cholinesterase inhibitors, for both conditions.

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