What is the appropriate target volume for SBRT to a non-vertebral osseous metastasis?   

Does your volume change based on fractionation (high-dose single fraction vs. 3-5 fractions)? Do you treat the entire circumference of long bones? What proximal/distal expansion? Are there situations where you treat only the GTV or GTV+small PTV expansion?

Answer from: Radiation Oncologist at Academic Institution