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Morphological changes in osteosarcoma after chemotherapy--COSS 80.

G Delling, H Krumme, M Salzer-Kuntschik

    Journal of Cancer Research and Clinical Oncology
    |January 1, 1983
    PubMed
    Summary
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    Smaller osteosarcomas show better response to chemotherapy than larger tumors. Tumor cell function, like osteoid production, is more critical for chemotherapy sensitivity than cell appearance.

    Area of Science:

    • Oncology
    • Pathology
    • Biochemistry

    Background:

    • Osteosarcoma is a primary bone cancer with variable treatment responses.
    • Assessing tumor characteristics is crucial for predicting chemotherapy efficacy.
    • Previous studies (Salzer-Kuntschik et al., 1983) have explored morphological regression grades in relation to chemotherapy.

    Purpose of the Study:

    • To investigate the relationship between osteosarcoma morphology and response to chemotherapy.
    • To identify key histological features influencing chemotherapy sensitivity.
    • To evaluate the utility of imprint cytology in assessing therapeutic effects.

    Main Methods:

    • Investigation of 45 osteosarcomas using undecalcified bone tumor tissue preparation.
    • Application of imprint cytology, histochemistry, and quantitative analysis.

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  • Morphological assessment of tumor regression and cellular characteristics.

    • Main Results:

    • Smaller osteosarcomas demonstrated a more favorable response to chemotherapy compared to larger tumors.
    • Osteoid production, trabecular tumor bone formation, and mineralization were more significant predictors of chemotherapy sensitivity than cell polymorphism.
    • Imprint cytology proved valuable for rapid assessment of therapeutic effects and cellular polymorphism.

    Conclusions:

    • Tumor size and specific cellular functions (osteoid production, mineralization) are key determinants of chemotherapy response in osteosarcoma.
    • Morphological evaluation, particularly in borderline cases (grade III/IV), requires assessment of at least two distinct tumor areas.
    • While imprint cytology aids in evaluating treatment response, predicting chemotherapy effectiveness from the initial biopsy remains challenging.