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Excellent local control from radiation therapy for high-risk neuroblastoma
Heather G Gatcombe1, R B Marcus, Howard M Katzenstein
1Department of Radiation Oncology, Emory University School of Medicine, Atlanta, GA 30322, USA.
International Journal of Radiation Oncology, Biology, Physics
|February 13, 2009
Summary
High-risk neuroblastoma patients achieved excellent local control with radiation therapy. Doses of 21-24 Gy are adequate for minimal residual disease, but dose escalation may benefit those with significant residual disease.
Area of Science:
- Pediatric Oncology
- Radiation Oncology
- Cancer Research
Background:
- Local recurrence is a significant challenge in treating high-risk neuroblastoma.
- Radiation therapy is an evolving component of neuroblastoma management.
- Optimal radiation doses and techniques are under investigation.
Purpose of the Study:
- To evaluate the efficacy of local radiation therapy in high-risk neuroblastoma patients.
- To assess local control rates and survival outcomes.
- To inform future radiation therapy strategies for neuroblastoma.
Main Methods:
- Retrospective analysis of 34 high-risk neuroblastoma patients treated between 2001 and 2007.
- Patients received local radiation therapy as part of multimodality treatment.
- Median follow-up was 33.6 months.
Main Results:
- Excellent 3-year local control rate of 94%.
- 3-year event-free survival was 66% and overall survival was 86%.
- Only two patients experienced local failure, both with persistent gross disease post-chemotherapy and surgery.
Conclusions:
- Local radiation therapy is highly effective in achieving local control for high-risk neuroblastoma.
- Doses of 21-24 Gy appear sufficient for patients with minimal residual disease.
- Prospective trials are needed to evaluate dose escalation for patients with significant residual disease.
