Local glucose metabolism is unaltered in reversible splenial lesion syndrome

Johann Philipp Zöllner1,2, Jennifer Wichert3, Susanne Schubert-Bast2,4

  • 1Department of Neurology and Epilepsy Center Frankfurt Rhine-Main, Goethe University Frankfurt, Frankfurt am Main, Germany.

Abstract

Insights

Reversible splenial lesion syndrome (RESLES) involves swelling in the brain

Area of Science:

  • Neurology
  • Radiology
  • Neuroimaging

Background:

  • Transient splenial oedema, or reversible splenial lesion syndrome (RESLES), is a rare MRI finding.
  • RESLES presents as focal oedema in the posterior corpus callosum and is linked to various clinical conditions.
  • The exact cause of RESLES remains unclear.

Purpose of the Study:

  • To investigate conflicting pathophysiological hypotheses of RESLES.
  • To measure local glucose metabolism in patients diagnosed with RESLES.

Main Methods:

  • Retrospective analysis of RESLES patients undergoing EEG monitoring after antiseizure medication reduction.
  • Measurement of local glucose uptake using PET/CT scans.
  • Comparison of matched cohorts with and without RESLES using non-parametric tests.

Main Results:

  • No significant difference in local glucose metabolism was observed in the splenium of RESLES patients compared to controls.
  • This finding held true for both regular and normalized glucose uptake value calculations.
  • Statistical analysis showed no significant difference (p = 0.902 and p = 0.535).

Conclusions:

  • The study found no evidence of local glucose hypometabolism in RESLES.
  • This supports the hypothesis that RESLES represents intercellular, intramyelinic oedema.
  • This type of oedema is distinct from typical, irreversible intracellular cytotoxic oedema.

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