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Related Experiment Videos

Permanent I-125 brain stem implants in children

P J Chuba1, L Zamarano, M Hamre

  • 1Department of Radiation Oncology, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA.

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|December 5, 1998
PubMed
Summary
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Iodine-125 implants for pediatric brain stem tumors show safety but poor tumor control for high-grade gliomas. Further research is needed for improved outcomes in these challenging CNS malignancies.

Area of Science:

  • Pediatric neuro-oncology
  • Radiation oncology
  • Neurosurgery

Background:

  • Brain stem gliomas are aggressive pediatric central nervous system (CNS) tumors.
  • Stereotactic interstitial brachytherapy offers a targeted radiation approach.

Purpose of the Study:

  • To evaluate the safety and efficacy of iodine-125 (I-125) implants for pediatric CNS tumors, particularly brain stem gliomas.
  • To assess tumor control and survival rates following I-125 brachytherapy.

Main Methods:

  • Retrospective analysis of 28 pediatric patients treated with I-125 implants between 1988 and 1997.
  • Ten patients received stereotactic implantation in the brain stem region for glioma.
  • Combined external beam radiation with fractionated stereotactic boost followed by I-125 interstitial therapy.

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Main Results:

  • No surgical complications were reported with catheter placement.
  • Four patients died within 7-9 months; four survived for 5-38 months (median 10 months).
  • Autopsies revealed progressive glioblastoma multiforme and necrosis; one patient with midbrain low-grade glioma (LGA) showed necrosis without tumor.

Conclusions:

  • Stereotactic interstitial brachytherapy with I-125 is safe for pediatric brain stem tumors.
  • Tumor control remains a significant challenge for high-grade brain stem gliomas despite high focal radiation doses.
  • I-125 implants may have a role in managing pediatric CNS malignancies, warranting further investigation.