Related Experiment Videos
Perioperative neutron brachytherapy with californium-252
B M Vtyurin1, V S Medvedev, V N Ivanov
1Brachytherapy Dept., Institute of Medical Radiology RAMS, Obninsk, Kaluga Region, Russia.
International Journal of Radiation Oncology, Biology, Physics
|January 1, 1992
Summary
Californium-252 (Cf-252) neutron brachytherapy showed initial local control in all head and neck cancer patients. Long-term cures were achieved in 25% of patients treated with this advanced radiation therapy.
Area of Science:
- Oncology
- Radiation Oncology
- Medical Physics
Background:
- Head and neck cancers present significant treatment challenges, often requiring innovative therapeutic approaches.
- Recurrent and persistent tumors have historically shown poor prognoses with conventional treatments.
Purpose of the Study:
- To evaluate the efficacy and outcomes of Californium-252 (Cf-252) neutron brachytherapy for recurrent and persistent head and neck tumors.
- To assess the feasibility of using a numerical reconstruction method for treatment planning in Cf-252 brachytherapy.
Main Methods:
- Retrospective analysis of 495 patients treated with Cf-252 neutron brachytherapy between 1973 and 1988.
- Detailed examination of eight patients with recurrent/persistent head and neck tumors treated with perioperative Cf-252 neutron brachytherapy.
- Utilized a numerical reconstruction method for precise localization and treatment planning of Cf-252 sources.
Main Results:
- All eight patients with recurrent/persistent head and neck tumors achieved initial local control.
- Dose rates ranged from 3.2 to 11.1 cGy/h, with minimal peripheral doses between 3 Gy and 8 Gy.
- Two patients experienced local recurrence; three died within the first year and three within the second year post-therapy. Two patients achieved long-term cure (8 and 9 years), representing a 25% long-term survival rate.
Conclusions:
- Cf-252 neutron brachytherapy demonstrated effectiveness in achieving initial local control for challenging head and neck tumors.
- While significant toxicity was observed, Cf-252 neutron brachytherapy offers a potential for long-term survival in a subset of patients with recurrent or persistent disease.