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Related Experiment Videos

Clear cell sarcoma. An immunohistochemical and ultrastructural study.

T Hasegawa1, T Hirose, E Kudo

  • 1First Department of Pathology, University of Tokushima School of Medicine, Japan.

Acta Pathologica Japonica
|May 1, 1989
PubMed
Summary

Clear cell sarcoma histogenesis was studied using immunohistochemistry and electron microscopy. Findings suggest melanocytic differentiation, though some tumors show undifferentiated neuroectodermal origins.

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Area of Science:

  • Oncology
  • Pathology
  • Dermatology

Background:

  • Clear cell sarcoma is a rare soft tissue sarcoma.
  • Its histogenesis remains incompletely understood.
  • Distinguishing it from other sarcomas is clinically important.

Purpose of the Study:

  • To investigate the histogenesis of clear cell sarcoma.
  • To determine the cellular origin of clear cell sarcoma.
  • To differentiate clear cell sarcoma from other neoplasms.

Main Methods:

  • Immunohistochemical examination of five clear cell sarcoma tumors.
  • Electron microscopic examination of two clear cell sarcoma tumors.
  • Utilized antibodies including HMB-45, anti-S-100 protein, anti-vimentin, and Leu-7.

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Main Results:

  • Melanin production and melanosomes observed in some tumors.
  • Positive reactions for HMB-45, anti-S-100 protein, and anti-vimentin in most tumors.
  • All tumors showed Leu-7 immunoreactivity; no cytokeratin or EMA detected.

Conclusions:

  • HMB-45 immunoreactivity strongly supports melanocytic differentiation.
  • Some clear cell sarcomas may represent undifferentiated neuroectodermal tumors.
  • Further research is needed to fully elucidate clear cell sarcoma histogenesis.