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Related Experiment Videos

False-positive lung scans and radiotherapy.

N T Bateman, D N Croft

    British Medical Journal
    |April 3, 1976
    PubMed
    Summary

    Radiation-induced lung vasculitis can cause ventilation-perfusion scan abnormalities, mimicking pulmonary embolism. Careful interpretation is needed for patients with prior chest radiation to avoid misdiagnosis.

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    Area of Science:

    • Radiology
    • Oncology
    • Pulmonary Medicine

    Background:

    • Obliterative vasculitis in the lungs can resemble pulmonary embolism on ventilation-perfusion scans.
    • Chest wall radiotherapy for breast cancer can induce pulmonary vasculitis.

    Purpose of the Study:

    • To examine ventilation-perfusion scans in breast cancer patients post-radiotherapy.
    • To determine if radiation-induced pulmonary vasculitis mimics pulmonary embolism findings.

    Main Methods:

    • Retrospective analysis of ventilation-perfusion scans from six breast cancer patients.
    • Review of scans from patients who received chest wall radiotherapy.

    Main Results:

    • 11 out of 12 scans (91.7%) demonstrated perfusion defects.
    • Ventilation-perfusion mismatch was observed on the irradiated side in most scans.
    • Findings suggest radiation-induced vasculitis can cause scan abnormalities.

    Conclusions:

    • Ventilation-perfusion scan findings in patients with prior lung radiation require careful interpretation.
    • Perfusion defects and mismatch may result from radiation-induced vasculitis, not necessarily pulmonary embolism.

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