In contrast, the NSABP B-43 compared adjuvant trastuzumab versus placebo after lumpectomy for patients with HER2-positive DCIS and did not report a significant reduction in the IBTR rates, though it showed a trend toward numerical improvement in non-invasive IBTR rates [ 27 ].
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Ten-Year Follow-up Clinical Outcomes and the Role of Adjuvant Chemotherapy in HER2-Positive Patients with Microinvasive Breast Cancer.
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