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Interstitial thermoradiotherapy

M R Manning, T C Cetas, E W Gerner

    National Cancer Institute Monograph
    |June 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    This study combined heat therapy with interstitial radiation for recurrent tumors. The safe and effective thermoradiotherapy treatment resulted in complete tumor disappearance in 63% of patients.

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    Area of Science:

    • Oncology
    • Radiation Oncology
    • Medical Physics

    Background:

    • Advanced or recurrent accessible tumors often resist conventional treatments.
    • Combining hyperthermia with radiation may improve treatment efficacy.
    • Interstitial approaches offer localized heat delivery.

    Purpose of the Study:

    • To evaluate the safety and efficacy of combining interstitial hyperthermia with low dose rate interstitial radiation.
    • To assess treatment response and technical aspects of radiofrequency-induced hyperthermia in a clinical setting.
    • To investigate thermoradiotherapy for patients with refractory, locally recurrent cancers.

    Main Methods:

    • Phase I clinical trial involving 25 patients with 27 locally recurrent, accessible tumors.
    • Interstitial implants used as electrodes for radiofrequency hyperthermia (43-45°C for 30 minutes).

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  • Subsequent low dose rate interstitial irradiation using 192Ir or 226Ra.

    • Main Results:

    • All patients (100%) showed a response to thermoradiotherapy.
    • Complete tumor disappearance was observed in 63% of treated lesions.
    • Partial response (≥50% volume reduction) occurred in 37% of lesions, with no observed regrowth.
    • Minimal normal tissue complications were reported.

    Conclusions:

    • Interstitial thermoradiotherapy is a safe and effective treatment modality for advanced or recurrent accessible malignancies.
    • The combination of localized heat and radiation demonstrates significant efficacy in difficult-to-treat cancers.
    • This approach offers a promising option for patients who have failed prior therapies.