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Related Experiment Videos

[Immunohistochemical study for choroid plexus papillomas and ependymomas].

K Kunishio1, T Shiraishi, N Mishima

  • 1Department of Neurological Surgery, Okayama University.

Neurologia Medico-Chirurgica
|December 1, 1991
PubMed
Summary

Transthyretin (TTR) is a useful marker for distinguishing choroid plexus papilloma (CPP) from ependymoma. CPPs lose TTR synthesis with glial differentiation, unlike ependymomas.

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Area of Science:

  • Neuro-oncology
  • Immunohistochemistry
  • Tumor markers

Context:

  • Choroid plexus papillomas (CPPs) and ependymomas are central nervous system tumors.
  • Differentiating between CPP and ependymoma can be challenging.
  • Immunohistochemistry aids in tumor diagnosis.

Purpose:

  • To investigate the expression of glial fibrillary acidic protein (GFAP), S-100 protein, cytokeratin (CKER), epithelial membrane antigen (EMA), and transthyretin (TTR) in CPP and ependymoma.
  • To identify potential diagnostic markers for differentiating these tumors.

Summary:

  • Immunohistochemical analysis of 11 CPPs and 19 ependymomas revealed distinct protein expression patterns.
  • CPPs were positive for CKER, EMA, and TTR, with variable S-100 and GFAP expression.

Related Experiment Videos

  • Ependymomas showed strong GFAP and S-100 positivity, but lacked TTR.
  • GFAP expression in CPP correlated with reduced TTR synthesis, suggesting glial differentiation.

    • Impact:

    • Transthyretin (TTR) serves as a valuable marker for differentiating choroid plexus papilloma (CPP) from ependymoma.
    • Understanding protein expression patterns aids in accurate neuropathological diagnosis.
    • This study provides insights into the differentiation pathways of these tumors.