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Related Experiment Videos

Low-grade and anaplastic gliomas: differences in architecture evaluated with diffusion-tensor MR imaging.

Einar Goebell1, Susanne Paustenbach, Ole Vaeterlein

  • 1Department of Neuroradiology, University of Hamburg, Martinistrasse 52, 20251 Hamburg, Germany. goebell@uke.uni-hamburg.de

Radiology
|February 18, 2006
PubMed
Summary

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Diffusion-tensor imaging reveals differences in glial brain tumors. High-grade gliomas show disrupted white matter tracts at the tumor border compared to low-grade gliomas.

Area of Science:

  • Neuroimaging
  • Oncology
  • Radiology

Background:

  • Distinguishing World Health Organization (WHO) grade II and III glial brain tumors is crucial for treatment planning.
  • Diffusion-tensor magnetic resonance (MR) imaging offers insights into white matter tract integrity.

Purpose of the Study:

  • To prospectively evaluate if diffusion-tensor MR imaging can differentiate between WHO grade II and III glial brain tumors based on tumor architecture and peritumoral tract invasion.

Main Methods:

  • Diffusion-tensor MR imaging was performed on 23 patients with histologically confirmed gliomas (11 WHO grade II, 12 WHO grade III).
  • Fractional anisotropy (FA) ratios were calculated in tumor center, tumor border, and normal-appearing white matter (NAWM).
  • Comparisons were made between low-grade and high-grade gliomas using the Mann-Whitney U test.

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Main Results:

  • Median FA ratios at the tumor border were significantly different between grade II (0.733) and grade III (0.449) gliomas (P = .01).
  • No significant differences in FA ratios were found in the tumor center or adjacent NAWM between the two grades.
  • Low FA ratios in the tumor center indicated disorganization of fiber tracts in both grades.

Conclusions:

  • The tumor periphery of low-grade gliomas retains more preserved fiber tracts than high-grade gliomas.
  • High-grade gliomas exhibit significant disarrangement of white matter tracts at their border.
  • Diffusion-tensor imaging, particularly FA ratios at the tumor border, can help differentiate glial tumor grades.