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Chordoma: an immunohistologic study.

P Abenoza, R K Sibley

    Human Pathology
    |July 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Immunohistochemical markers like cytokeratin are useful in diagnosing chordoma, distinguishing it from other chondroid tumors. Epithelial markers specifically identified 93% of chordomas, aiding differential diagnosis.

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    Area of Science:

    • Surgical Pathology
    • Oncology
    • Histopathology

    Background:

    • Chordoma is a rare bone tumor with distinct histologic features.
    • Differential diagnosis of chordoma can be challenging due to overlapping histologic characteristics with other chondroid tumors.
    • Immunohistochemistry plays a crucial role in refining tumor classification.

    Purpose of the Study:

    • To evaluate the utility of cytokeratin, S-100 protein, carcinoembryonic antigen (CEA), and vimentin in differentiating chordoma from other chondroid tumors.
    • To identify specific immunohistochemical markers for accurate chordoma diagnosis.

    Main Methods:

    • Tissue samples from 14 chordomas, 5 myxoid chondrosarcomas, and 15 other chondroid tumors were analyzed.
    • Immunohistochemical staining was performed for cytokeratin, S-100 protein, CEA, and vimentin.

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  • Staining patterns were compared across different tumor types.

    • Main Results:

    • Epithelial markers (cytokeratin) showed positive staining in 93% of chordomas, with no staining in other tumor types.
    • S-100 protein was positive in 64% of chordomas, 20% of myxoid chondrosarcomas, and 87% of other chondroid tumors.
    • Vimentin was positive in all tumors; CEA was positive in 3 chordomas.

    Conclusions:

    • Cytokeratin is a highly specific marker for chordoma, aiding in its distinction from chondroid tumors.
    • The combination of immunohistochemical markers, particularly cytokeratin, is valuable for the differential diagnosis of chordoma.
    • These findings support the use of specific antibodies in routine histopathological evaluation of suspected chordomas.