What do you recommend to a patient who has biopsy positive DCIS or invasive carcinoma and at time of lumpectomy the pathology is benign (assuming biopsy pathology and post surgical tumor needle localization verified)?

I use the same factors in these cases as I do in any DCIS case with regard to estimating the risk of local recurrence and therefore the benefit of radiation: patient age, DCIS grade, margin status, size of DCIS, and ER/PR positivity. With regard to grade and ER/PR positivity, that information should...