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[Proton irradiation of bone metastases]
Meditsinskaia Radiologiia
|June 1, 1984
Summary
Proton beam radiation therapy effectively treated breast cancer bone metastases near critical structures. Reactions were comparable to conventional radiation, with significant therapeutic effects observed in all patients.
Area of Science:
- Oncology
- Radiation Oncology
- Medical Physics
Context:
- Breast cancer bone metastases pose significant treatment challenges, particularly when located near vital organs.
- Conventional radiation therapy can be limited by toxicity to surrounding healthy tissues.
- Proton beam therapy offers potential advantages in dose distribution and sparing of normal tissues.
Purpose:
- To evaluate the efficacy and safety of proton beam radiation therapy for breast cancer bone metastases.
- To assess patient response and tolerance to proton therapy in this specific clinical scenario.
- To identify technical requirements for optimizing proton therapy for extensive bone metastases.
Summary:
- Proton beams (100-130 MeV, 40-100 mm range, up to 6 cm diameter) were used for bone metastases near sensitive organs (skull, sternum, ribs, jaw).
- Medium fractionation regimens (single doses 4-10 Gy, 1-7 fractions, total 17-28 Gy) were employed.
- Patient outcomes showed reactions consistent with delivered dose and regimen, comparable to conventional radiation, with a marked therapeutic effect in all cases.
Impact:
- Proton therapy demonstrates a marked therapeutic effect for breast cancer bone metastases.
- Patient reactions are manageable and comparable to conventional radiotherapy.
- Future development requires larger diameter proton beams and greater range for treating extensive bone metastases.