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Related Experiment Videos

Sacral meningeal cysts: evaluation with MR imaging

S W Davis1, L M Levy, D J LeBihan

  • 1Department of Radiology, Georgetown University Medical Center, Washington, DC 20007.

Radiology
|May 1, 1993
PubMed
Summary

Flow-sensitive magnetic resonance (MR) imaging can differentiate symptomatic from asymptomatic sacral meningeal cysts. Non-communicating cysts were symptomatic, while communicating cysts were not, aiding in diagnosis.

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Area of Science:

  • Radiology
  • Neuroimaging
  • Medical Diagnostics

Background:

  • Sacral meningeal cysts present diagnostic challenges for radiologists.
  • Determining if a sacral meningeal cyst is symptomatic is often difficult.
  • There is a need for radiographic criteria to identify symptomatic cysts.

Purpose of the Study:

  • To evaluate the utility of flow-sensitive magnetic resonance (MR) imaging in differentiating symptomatic from asymptomatic sacral meningeal cysts.
  • To establish radiographic criteria for cyst classification based on communication with the subarachnoid space.

Main Methods:

  • Conventional MR imaging and a specifically designed flow-sensitive sequence were used.
  • Twenty-four sacral meningeal cysts in 19 patients were characterized.

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  • Cysts were assessed for diameter and communication with the subarachnoid space.

    • Main Results:

    • No significant difference in cyst size was found between symptomatic and asymptomatic groups.
    • A clear disparity was observed in communication with the subarachnoid space.
    • All five asymptomatic cysts communicated with the subarachnoid space on MR flow studies.
    • None of the seven symptomatic cysts communicated on MR flow studies.

    Conclusions:

    • Flow-sensitive MR imaging is valuable for differentiating communicating from non-communicating sacral meningeal cysts.
    • This differentiation may help classify lesions as more or less likely to be symptomatic.
    • The study proposes a new imaging-based approach for sacral cyst evaluation.