What is the threshold for negative surgical margins in multifocal microinvasive carcinoma of the breast?   

Do you follow invasive or DCIS guidelines? Would you consider re-excision in a patient with multifocal microinvasive carcinoma of the breast arising in grade 3 DCIS. DCIS 3.8cm, closest margin to DCIS < 0.1mm, closest margin to invasive disease 5mm.

Answer from: at Academic Institution

Answer from: Radiation Oncologist at Academic Institution
Radiation Oncologist at Weill Cornell Medical College
agree. This is how I practice in the clinic. Mam...
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