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Chondroid chordoma.

G W Mierau1, D A Weeks

  • 1Department of Pathology, Children's Hospital, Denver, Colorado 80218.

Ultrastructural Pathology
|January 1, 1987
PubMed
Summary
This summary is machine-generated.

Chondroid chordoma exhibits epithelial characteristics, not cartilaginous origins. Electron microscopy and immunohistochemistry confirm chondroid and epithelial areas are expressions of the same tumor entity.

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Area of Science:

  • Oncology
  • Surgical Pathology
  • Molecular Pathology

Background:

  • The classification of chondroid chordoma remains debated, with some advocating for its abandonment in favor of a cartilaginous origin interpretation.
  • Distinguishing between primary chondrocytic neoplasms and chordoma variants with chondroid features is crucial for accurate diagnosis and treatment.

Observation:

  • Electron microscopy and immunohistochemistry revealed epithelial characteristics in both chondroid and epithelial areas of these neoplasms.
  • Specific markers such as desmosomes, cytokeratin, carcinoembryonic antigen (CEA), and epithelial membrane antigen (EMA) were present in chondroid areas.
  • Microtubular inclusions, vimentin, and S-100 protein were observed in epithelial areas, indicating shared cellular components.

Findings:

  • The co-expression of epithelial and mesenchymal markers, along with gradual transitions between chondroid and epithelial areas, supports a unified origin.

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  • Sequential biopsies demonstrated the evolution of a chondromatous neoplasm into a typical chordoma.
  • These findings indicate that chondroid and epithelial areas represent different morphologic expressions of the same entity.

    • Implications:

    • The study refutes the abandonment of the term "chondroid chordoma" and supports its recognition as a variant of chordoma.
    • This research clarifies the histogenesis of chondroid chordoma, aiding in precise diagnosis and potentially influencing therapeutic strategies.
    • Understanding chondroid chordoma as a morphologic variant of chordoma is essential for accurate prognostic assessment and patient management.