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Microvascular Decompression: Salient Surgical Principles and Technical Nuances
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White matter structural changes before and after microvascular decompression for hemifacial spasm.

Kuan Lv1,2, Chuanpeng Zhang2,3, Bing Liu1,4

  • 1Department of Radiology, China-Japan Friendship Hospital, No. 2 East Yinghua Road, Chaoyang District, Beijing, 100029, China.

Brain Structure & Function
|March 19, 2024
PubMed
Summary

White matter networks are disrupted in hemifacial spasm (HFS) patients before and after microvascular decompression (MVD). These network alterations correlate with clinical outcomes, suggesting potential biomarkers for MVD patient selection.

Keywords:
Diffusion weighted imagingGraph theoryHemifacial spasmMicrovascular decompressionStructural connectivity

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Graph Theory

Background:

  • Hemifacial spasm (HFS) involves involuntary facial muscle contractions.
  • Microvascular decompression (MVD) is a primary surgical treatment for HFS.
  • Diffusion Weighted Imaging (DWI) enables non-invasive white matter (WM) network reconstruction.

Purpose of the Study:

  • To compare whole-brain WM network topology between HFS patients and healthy controls.
  • To investigate WM network changes in HFS patients pre- and post-MVD.
  • To explore correlations between WM network properties and clinical outcomes in HFS.

Main Methods:

  • Utilized Diffusion Weighted Imaging (DWI) to reconstruct WM networks.
  • Applied graph theory to analyze network topology.
  • Compared network organization in 32 HFS patients (pre- and post-MVD) and 32 healthy controls.

Main Results:

  • HFS patients exhibited disrupted WM networks compared to controls, evident both pre- and post-MVD.
  • Network disruptions were primarily observed in somatomotor, limbic, and default mode networks.
  • No significant WM network differences were found between pre- and post-MVD states.
  • Altered topological properties in the postoperative group correlated with clinical outcomes.

Conclusions:

  • White matter structural networks are disrupted in HFS, persisting after MVD.
  • Postoperative WM alterations correlate with clinical outcomes, potentially serving as biomarkers.
  • These findings may aid in selecting HFS patients who will benefit from MVD.