For a small focally positive DCIS margin in the setting of invasive disease and negative invasive margins, not undergoing re-excision, what boost dose would you use?   

What if positive margin is felt to be from a DCIS skip lesion (initial DCIS margins widely negative but small focus DCIS found in additional tissue with focally positive margin over a span of <1mm)? Would you boost over 10 Gy?



Answer from: Radiation Oncologist at Academic Institution