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Stereotactic Adoptive Transfer of Cytotoxic Immune Cells in Murine Models of Orthotopic Human Glioblastoma Multiforme Xenografts
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Hyperfractionated radiotherapy for children with brainstem gliomas: a pilot study using 7,200 cGy.

R J Packer1, J C Allen, J L Goldwein

  • 1Children's Hospital of Philadelphia, Division of Neurology, PA 19104.

Annals of Neurology
|February 1, 1990
PubMed
Summary

High-risk childhood brainstem gliomas show improved outcomes with hyperfractionated radiotherapy. A trial using 7,200 cGy demonstrated a statistically significant increase in progression-free survival compared to lower doses.

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Area of Science:

  • Pediatric Oncology
  • Radiation Oncology
  • Neuro-Oncology

Background:

  • Brainstem gliomas are aggressive childhood central nervous system tumors, notoriously resistant to therapy.
  • High-risk cases, with diffuse involvement or anaplasia, have a poor prognosis despite conventional radiotherapy.
  • Hyperfractionated radiotherapy offers a potential strategy to enhance tumor control without increasing toxicity.

Purpose of the Study:

  • To evaluate the efficacy and safety of a higher dose of hyperfractionated radiotherapy in high-risk pediatric brainstem gliomas.
  • To compare outcomes with historical controls and previous lower-dose hyperfractionation regimens.

Main Methods:

  • A multiinstitutional phase I/II trial was conducted for high-risk brainstem glioma patients.
  • Treatment involved hyperfractionated radiotherapy at 100 cGy twice daily to a total dose of 7,200 cGy.
  • Patient responses, progression-free survival, and toxicity were assessed.

Main Results:

  • A 30% actuarial progression-free survival at 20 months was observed.
  • Twenty-three of 31 evaluable patients showed an objective radiographic response.
  • Statistically significant improvement in progression-free survival was noted compared to historical controls and a 6,480 cGy regimen (p < 0.01).

Conclusions:

  • Higher-dose hyperfractionated radiotherapy (7,200 cGy) significantly improves progression-free survival in high-risk pediatric brainstem gliomas.
  • The treatment was well-tolerated, with transient side effects and no treatment-related deaths.
  • This regimen represents a promising advancement for managing these challenging tumors.