Would you recommend PMRT in a patient with a microinvasive component but a large DCIS component who had a mastectomy with negative margins?

What size of DCIS would make you concerned? Would you estimate the risk of recurrence with and without radiation?

Answer from: Radiation Oncologist at Community Practice

Patients with DCIS treated with mastectomy and negative margins wouldn't get PMRT, so this patient wouldn't either. Essentially, they have an extensive intraductal component, and EIC with negative margins is not a risk for recurrence, thus PMRT would not be warranted.

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Radiation Oncologist at SJRO PC
What if the DCIS was 4.8 cm?

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Would you recommend PMRT in a patient with a microinvasive component but a large DCIS component who had a mastectomy with negative margins?

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