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Osteosarcoma: chemotherapy-induced changes at MR imaging.

H C Holscher1, J L Bloem, D Vanel

  • 1Department of Diagnostic Radiology, University Hospital Leiden, The Netherlands.

Radiology
|March 1, 1992
PubMed
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Magnetic resonance (MR) imaging can predict poor chemotherapy response in osteosarcoma patients by identifying increased tumor volume or persistent edema. However, MR imaging is less reliable for predicting good treatment responses.

Area of Science:

  • Oncology
  • Radiology
  • Medical Imaging

Background:

  • Osteosarcoma chemotherapy response assessment is crucial for treatment planning.
  • Magnetic resonance (MR) imaging is a key modality for evaluating treatment effects.
  • Accurate prediction of treatment response aids in optimizing patient management.

Purpose of the Study:

  • To determine the efficacy of MR imaging in differentiating good from poor responders to preoperative chemotherapy in osteosarcoma.
  • To identify specific MR imaging features predictive of histopathologic response.

Main Methods:

  • Fifty-seven osteosarcoma patients undergoing chemotherapy were evaluated using spin-echo MR imaging before and after treatment.
  • Histopathologic examination of resected specimens served as the gold standard for response quantification.

Related Experiment Videos

  • Correlation analysis was performed between MR imaging findings and histopathologic outcomes.

    • Main Results:

    • Increased tumor volume and persistent or increased edema on MR imaging were strong predictors of a poor histopathologic response (85%-92% predictive values).
    • Decreased or unchanged tumor volume and reduced edema were poor predictors of a good response (56%-62% predictive values).
    • Changes in tumor demarcation, low signal intensity areas, and joint effusion were not consistently correlated with histopathologic response.

    Conclusions:

    • Subjective interpretation of MR images can identify poor responders based on increased tumor volume or lack of edema reduction.
    • Objective MR imaging criteria are less effective in predicting good treatment responders in osteosarcoma.
    • Further refinement of MR imaging analysis may improve response prediction in osteosarcoma chemotherapy.