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Related Experiment Videos

Epiphyseal involvement in osteosarcoma.

K I Norton1, G Hermann, I F Abdelwahab

  • 1Department of Radiology, Mount Sinai Medical Center, City University of New York, NY 10029-6574.

Radiology
|September 1, 1991
PubMed
Summary

Magnetic resonance (MR) imaging accurately detects transphyseal spread in pediatric osteosarcoma, challenging the belief that the physis prevents tumor invasion. Plain radiography is less reliable for assessing this critical factor in long bone cancers.

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Area of Science:

  • Orthopedic Oncology
  • Pediatric Radiology
  • Skeletal Imaging

Background:

  • Osteosarcoma is a primary malignant bone tumor common in children and adolescents.
  • Accurate staging of osteosarcoma, particularly assessing epiphyseal involvement, is crucial for treatment planning and prognosis.
  • The physis (growth plate) has been traditionally considered a barrier to tumor spread, but evidence is limited.

Purpose of the Study:

  • To evaluate the accuracy of plain radiography and magnetic resonance (MR) imaging in detecting transphyseal spread of long bone osteosarcoma in patients with nonfused epiphyses.
  • To correlate imaging findings with surgical and pathological results.
  • To challenge the misconception of the physis as an absolute barrier to tumor extension.

Main Methods:

Related Experiment Videos

  • Retrospective review of 15 consecutive patients with long bone osteosarcoma and nonfused epiphyses.
  • Comparison of plain radiography and MR imaging findings for transphyseal tumor involvement.
  • Correlation of imaging data with surgical resection margins and histopathological examination.

    • Main Results:

    • MR imaging demonstrated 100% accuracy in identifying epiphyseal spread when present (12 of 15 cases).
    • Conventional radiography accurately predicted transphyseal spread in only 60% of cases (9 of 15).
    • No false-positive findings were reported for either imaging modality.

    Conclusions:

    • MR imaging is a highly accurate tool for assessing transphyseal tumor spread in pediatric osteosarcoma.
    • The physis does not consistently act as a barrier to the spread of osteosarcoma.
    • Accurate imaging assessment of epiphyseal involvement is vital for surgical planning and improving outcomes in osteosarcoma.