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Topics:
Breast Cancer • Radiation Oncology
What margin do you give around the internal mammary vessels when treating IMN nodes for breast cancer?
How many intercostal spaces do you include? Do you vary these parameters based on the disease characteristics?
Answer from: Radiation Oncologist at Academic Institution
I typically use 8mm-1 cm around the vessels, excluding sternum and lung. I contour the vessels in the 1st-3rd intercostal spaces. MA20 used 1 cm around the vessels with coverage by the 80% IDL.
The only exception to this approach is if patients had radiographically enlarged internal mammary no...
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