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Related Experiment Videos

Microwave hyperthermia radiosensitized iridium-192 for recurrent brain malignancy.

T L Borok1, A Winter, J Laing

  • 1Metcalf Institute-Radiation Oncology, Hospital Center, Orange, NJ 07051.

Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists
|March 1, 1988
PubMed
Summary

Interstitial microwave hyperthermia and brachytherapy show promise for recurrent brain tumors. This study found significant neurologic and symptomatic improvement in patients with recurrent Central Nervous System malignancies.

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Area of Science:

  • Oncology
  • Neurosurgery
  • Radiation Oncology

Background:

  • Recurrent brain malignancies often present with Central Nervous System (CNS) symptoms requiring intervention.
  • Previous teletherapy for brain tumors necessitates novel treatment approaches for recurrence.

Purpose of the Study:

  • To evaluate the efficacy and safety of interstitial microwave hyperthermia, with or without brachytherapy, for recurrent brain malignancies.
  • To assess treatment response, complications, and long-term outcomes in patients with recurrent CNS tumors.

Main Methods:

  • Twenty-one patients with recurrent brain malignancies received interstitial microwave hyperthermia (43°C for 180 degree-minutes).
  • Fifteen patients received hyperthermia alone (toxicity pilot), while six also received interstitial Ir-192 brachytherapy.

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  • CT-guided stereotactic techniques were employed for biopsy, brachytherapy, and thermal monitoring.

    • Main Results:

    • All 15 patients in the toxicity pilot experienced neurologic improvement; 12 showed symptomatic improvement and objective response (mass reduction/necrosis).
    • The 6 patients receiving hyperthermia and brachytherapy also demonstrated neurologic improvement, symptom reduction, and objective tumor response.
    • Three patients in the brachytherapy group remain alive, with one experiencing transient improvement.

    Conclusions:

    • Interstitial microwave hyperthermia is a viable treatment for recurrent CNS malignancies, offering significant patient benefit.
    • The combination of hyperthermia and brachytherapy shows potential for improved outcomes in select patients.
    • Novel techniques for CT-guided interstitial procedures minimize trauma and enhance treatment delivery.