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Wallerian degeneration of the corticospinal tracts: postmortem MR-pathologic correlations

E Matsusue1, S Sugihara, S Fujii

  • 1Division of Radiology, Department of Pathophysiological and Therapeutic Science, Tottori University, Tottori, Japan. matsusue@grape.med.tottori-u.ac.jp

Acta Radiologica (Stockholm, Sweden : 1987)
|July 6, 2007
PubMed

Insights

Postmortem MRI T2 hyperintensities correlate with Wallerian degeneration stages. Different stages show distinct myelin and axon changes, aiding diagnosis.

Area of Science:

  • Neuroimaging
  • Neuropathology
  • Neuroanatomy

Background:

  • Wallerian degeneration is a process affecting nerve tracts after injury.
  • Cerebral embolic infarction can cause Wallerian degeneration.
  • Postmortem imaging and histology are crucial for understanding neurodegenerative processes.

Observation:

  • Two autopsy cases with Wallerian degeneration of corticospinal and corticopontine tracts were studied.
  • Postmortem magnetic resonance (MR) images were correlated with histological findings.
  • T2 hyperintensities were observed in affected tracts.

Findings:

  • Early-stage Wallerian degeneration showed myelin vacuolation on T2-weighted MR images.
  • Subacute and chronic stages revealed marked myelin and axon loss with macrophages.
  • Histological findings varied across different stages of Wallerian degeneration despite similar T2 hyperintensities.

Implications:

  • Postmortem MR imaging can reveal distinct histological changes in Wallerian degeneration.
  • Understanding these correlations aids in interpreting neuroimaging findings in neurological diseases.
  • This study enhances the correlation between imaging and neuropathology in Wallerian degeneration.

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