Can you re-treat vertebral metastases with SBRT?
If a patient had 35 Gy in 5 fractions to a vertebral bone metastasis with SBRT two years ago, how much more can I give now to the whole vertebra with spinal cord included?
The previous treatment included half the width of the spinal cord at that level of vertebra.
1 Answer
Mednet MemberInvited Expert
Radiation Oncology · Johns Hopkins University
Answered on
I typically utilize the same prescription doses in the upfront and re-irradiation setting. The difference is typically in my cord constraint (and in effect the coverage of the target). In regards to the spinal cord constraint, I typically allow a cumulative BED3 of 70-75 Gy to the cord plus 2 mm acc...
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