Do you have a margin requirement beyond negative for DCIS when considering observation following lumpectomy?   

I sometimes receive pathology reports that state the margin is negative but do not quantify DCIS proximity to margin. I typically like a margin of 2-3mm to omit RT. In someone with a low grade small DCIS, would you feel comfortable omitting RT without the knowledge of whether there is a close margin?



Answer from: Radiation Oncologist at Community Practice