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Related Experiment Videos

[Immunohistochemistry in oligodendrogliomas].

Arlete Hilbig1, Lígia Maria Barbosa-Coutinho, Gabriel Corteze Netto

  • 1Clínica Médica, UFRGS, Brazil. hilbiga@fffcmpa.tche.br

Arquivos De Neuro-Psiquiatria
|April 20, 2006
PubMed
Summary

Oligodendrogliomas (OL) can show focal glial and neuronal markers, complicating diagnosis. This study found that while some OLs exhibit these markers, widespread neuronal staining may indicate other tumors.

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Area of Science:

  • Neuro-oncology
  • Tumor pathology
  • Immunohistochemistry

Context:

  • Oligodendrogliomas (OL) present with characteristic clear cytoplasm and round nuclei.
  • Differential diagnosis of OL includes central neurocytomas, DNTs, and clear cell ependymomas.
  • Immunohistochemistry is crucial for distinguishing between these similar entities.

Purpose:

  • To investigate glial and neuronal differentiation in typical oligodendrogliomas using immunohistochemical markers.
  • To assess the expression of glial fibrillary acidic protein (GFAP), neuron-specific enolase (NSE), synaptophysin, and S-100 in OL specimens.

Summary:

  • Out of 42 OL specimens, 78.5% showed GFAP positivity, often focally.
  • Neuronal differentiation markers (NSE/synaptophysin) were focally positive in 28.5% of cases.

Related Experiment Videos

  • S-100 expression was observed in 80.9% of the oligodendrogliomas.

    • Impact:

    • Results suggest that focal glial protein expression in OL may stem from reactive astrocytes or astrocyte-oligodendrocyte transitional forms.
    • Focal neuronal differentiation can occur in typical oligodendrogliomas.
    • Widespread neuronal marker staining warrants caution, as it might suggest central neurocytoma, necessitating careful evaluation of tissue quantity.