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Extra-axial ependymoma--case report

K Hayashi1, M Tamura, T Shimozuru

  • 1Department of Neurosurgery, Faculty of Medicine, University of Kagoshima, Japan.

Neurologia Medico-Chirurgica
|May 1, 1994
PubMed
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This case report details an unusual extra-axial ependymoma in a child. Surgical removal was successful, confirming a clear cell-type ependymoma.

Area of Science:

  • Neuro-oncology
  • Pediatric Neurosurgery
  • Neuroradiology

Background:

  • Ependymomas are typically intra-axial tumors arising from the central nervous system.
  • Extra-axial ependymomas are rare, posing diagnostic and surgical challenges.

Observation:

  • A 13-year-old boy presented with an atypical ependymoma exhibiting extra-axial extension.
  • Imaging revealed a cystic and calcified mass over the occipital and parietal lobes, enhancing postcontrast.
  • Cerebral angiography identified the middle meningeal artery as the primary blood supply.

Findings:

  • Magnetic resonance imaging (MRI) showed a multilocular tumor with specific signal intensities on T1 and T2 weighted images.
  • Gadolinium enhancement was noted in the solid tumor and surrounding cystic tissue.

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  • Histopathological examination confirmed a clear cell-type ependymoma.

    • Implications:

    • This case highlights the importance of considering rare tumor locations and types in pediatric neuro-oncology.
    • Advanced imaging techniques are crucial for characterizing unusual ependymomas.
    • Successful en bloc resection suggests feasibility of surgical management for such rare presentations.