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Diffusion Imaging in the Rat Cervical Spinal Cord
10:46

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Published on: April 7, 2015

Diffusion-weighted imaging does not predict histological grading in meningiomas.

Luca Santelli1, Gaetano Ramondo, Alessandro Della Puppa

  • 1Department of Neuroradiology, Azienda Ospedaliera Università di Padova, Padova, Italy.

Acta Neurochirurgica
|April 30, 2010
PubMed
Summary

Diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) measurements are not reliable for grading meningiomas or identifying subtypes. These parameters are not recommended for surgical or treatment planning.

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Area of Science:

  • Neuroradiology
  • Oncology
  • Medical Imaging

Background:

  • Meningiomas are the most common primary intracranial tumors.
  • Accurate grading and subtyping are crucial for treatment planning.
  • Diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) measurements are non-invasive techniques that may aid in tumor characterization.

Purpose of the Study:

  • To evaluate the reliability of DWI and ADC measurements in differentiating benign from atypical/malignant meningiomas.
  • To assess the utility of DWI and ADC in distinguishing between different histological subtypes of meningiomas.

Main Methods:

  • Retrospective review of pre-operative DWI from 102 patients with pathologically proven intracranial meningiomas.
  • Classification of tumor DWI signal intensity relative to grey matter.
  • Measurement of ADC values and normalized ADC ratios by two independent neuroradiologists.
  • Comparison of imaging findings with histological grading and subtyping.

Main Results:

  • No statistically significant difference in mean ADC values or ADC ratios between typical and atypical/malignant meningiomas.
  • ADC values and ADC ratios did not significantly differ among meningioma subtypes.
  • High inter-observer agreement for ADC and ADC ratio measurements (r = 0.95 and 0.92).
  • DWI signal intensity did not significantly correlate with meningioma grading.

Conclusions:

  • DWI and ADC measurements appear unreliable for grading meningiomas or identifying histological subtypes.
  • These imaging parameters are not recommended for surgical or treatment planning in meningioma cases.
  • Further research may be needed to explore other advanced imaging techniques for meningioma characterization.