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Extraskeletal myxoid chondrosarcoma--a clinicopathologic and electron microscopic study

M Tsuneyoshi, M Enjoji, H Iwasaki

    Acta Pathologica Japonica
    |May 1, 1981
    PubMed
    Summary

    Extraskeletal myxoid chondrosarcoma is a rare soft tissue sarcoma. This study analyzed 14 cases, revealing a spectrum of cell differentiation and confirming chordoid sarcoma as a variant.

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    Area of Science:

    • Pathology
    • Oncology
    • Histology

    Background:

    • Extraskeletal myxoid chondrosarcoma (EMC) is a rare soft tissue sarcoma.
    • This study investigated the clinicopathologic features of EMC.

    Purpose of the Study:

    • To analyze 14 cases of EMC within a larger cohort of soft tissue sarcomas.
    • To characterize the histological and ultrastructural features of EMC.
    • To clarify the relationship between EMC and chordoid sarcoma.

    Main Methods:

    • Clinicopathologic analysis of 14 EMC cases.
    • Histological examination of tumor morphology.
    • Electron microscopy to study cell differentiation.

    Main Results:

    • EMC tumors primarily occurred in the lower extremities and buttocks.

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  • Histology showed cells in cords and strands within a myxoid matrix rich in chondroitin sulfate.
  • Electron microscopy demonstrated a differentiation continuum from chondroblastic to undifferentiated mesenchymal cells.
  • Morphological findings supported the inclusion of chordoid sarcoma as a variant of EMC.

    • Conclusions:

    • Extraskeletal myxoid chondrosarcoma exhibits a distinct morphology and cellular differentiation.
    • Chordoid sarcoma should be considered a variant of extraskeletal myxoid chondrosarcoma.