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How does your prescribed SRS dose vary with cavity size for treatment of resected brain metastases?
What is your cavity size/volume cutoff in selecting hypofractionated SRT over SRS?
Answer from: Radiation Oncologist at Academic Institution
I generally follow SRS dose for postop cavities as I do for unresected lesions. 20 Gy for < 2cm, 18 Gy for <3 cm, and 16 Gy for <4cm. For tumors greater than 3 cm I have been favoring hypofractionated RT.
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