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[Clear cell ependymoma--a case report]

T Abe1, A Wada, Y Mochizuki

  • 1Department of Neurosurgery, Showa General Hospital, Tokyo, Japan.

No to Shinkei = Brain and Nerve
|June 11, 1998
PubMed
Summary
This summary is machine-generated.

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This report details a rare intraaxial clear cell ependymoma case in a 46-year-old male. Ultrastructural examination proved more diagnostic than immunohistochemistry for this rare brain tumor.

Area of Science:

  • Neuro-oncology
  • Neurosurgery
  • Neuropathology

Background:

  • Ependymomas are glial tumors arising from ependymal cells.
  • Clear cell ependymoma is a rare histological variant, often presenting in adults.
  • Intraaxial tumors require precise diagnostic and surgical approaches.

Observation:

  • A 46-year-old male presented with right hemiparesis due to a left frontal lobe mass with a large cyst.
  • Imaging revealed a heterogeneous, enhancing intraaxial lesion with specific MRI signal characteristics.
  • Angiography demonstrated tumor vascularity supplied by the internal carotid artery.

Findings:

  • Histopathology confirmed clear cell ependymoma.
  • Immunohistochemistry showed positive vimentin and NSE, but negative GFAP, synaptophysin, and S-100.

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  • Ultrastructural analysis revealed diagnostic features like cilia, microvilli, and desmosomal junctions.

    • Implications:

    • Ultrastructural examination is crucial for diagnosing rare ependymoma variants when immunohistochemistry is inconclusive.
    • Complete surgical resection of the main tumor mass led to full recovery and no recurrence at one year.
    • This case highlights the importance of multimodal diagnostic techniques for intraaxial brain tumors.