When you treat postop head and neck cancer, do you typically add a CTV margin to the delineated postoperative bed, or just treat postop bed plus PTV margin?
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Do you add a CTV margin to the tumor bed?
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2 Answers
Mednet MemberInvited Expert
Radiation Oncology · Memorial Sloan Kettering Cancer Center
Answered on
We don't ever have a CTV margin.
It is postop bed which accounts for all pre-surgery GTV and all postoperative changes on imaging, also review the op note and path. We then add a 3-5mm margin to account for set-up.
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Mednet MemberInvited Expert
Radiation Oncology · Varian Medical Systems/Allegheny health network
Answered on
I think the practice would vary and there is also some uncertainty in the delineation of surgical bed. That being said, if post-op RT is for close or positive margin or PNI, then we make sure we add CTV margin to surgical bed and then PTV margin.
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