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Related Experiment Videos

Mesenchymal chondrosarcoma. An immunohistochemical study.

P E Swanson1, T J Lillemoe, J C Manivel

  • 1Department of Laboratory Medicine and Pathology, University of Minnesota School of Medicine, Minneapolis.

Archives of Pathology & Laboratory Medicine
|September 1, 1990
PubMed
Summary
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Mesenchymal chondrosarcoma, a rare bone and soft tissue tumor, was studied using immunohistochemistry. Findings suggest its immunophenotype resembles embryonic cartilage, but it

Area of Science:

  • Oncology
  • Pathology
  • Immunohistochemistry

Background:

  • Mesenchymal chondrosarcoma is a rare small-cell neoplasm of bone and soft tissue with accepted chondrogenic nature.
  • The small-cell component's phenotype and relation to precartilage mesenchyme are not well-defined.

Purpose of the Study:

  • To characterize the immunophenotype of mesenchymal chondrosarcoma's small-cell population.
  • To clarify the relationship between mesenchymal chondrosarcoma and precartilage mesenchyme.

Main Methods:

  • Immunohistochemical analysis of nine mesenchymal chondrosarcoma cases.
  • Utilized antibodies against vimentin, S100 protein, Leu-7 antigen, neuron-specific enolase, synaptophysin, desmin, muscle-specific actin, cytokeratin, and epithelial membrane antigen.
  • Employed the avidin-biotin-peroxidase complex (ABC) method.

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Main Results:

  • Small cells of mesenchymal chondrosarcoma did not express S100 protein.
  • All tumor components (small cells, chondroblasts, matrix) stained for Leu-7 antigen in six cases.
  • Neuron-specific enolase was found in small cells (4 cases) and lacunar cells (7 cases).
  • No expression of desmin, actin, cytokeratin, epithelial membrane antigen, or synaptophysin was detected.

Conclusions:

  • The immunophenotype of mesenchymal chondrosarcoma aligns with embryonic cartilage, supporting its origin from fetal chondroid tissues.
  • Immunohistologic studies have limited utility in differentiating mesenchymal chondrosarcoma from other small round cell lesions.