When and how to treat women with HER2-positive, small (pT1a-b), node-negative breast cancer?
2018
Abstract Small (pT1a-b), node-negative (pN0) breast cancer generally has a good prognosis. However, HER2-positive status is associated with an increased risk of relapse and decreased survival even in these tumors. Although there are only few data from prospective randomized trials, results of retrospective studies suggest adjuvant chemotherapy plus trastuzumab may improve outcomes of patients with pT1a-b pN0 HER2-positive breast cancer. On the other hand, trastuzumab is potentially associated with increased cardiac toxicity, especially when combined with anthracycline-based chemotherapy. A valid strategy for improving cardiac safety is the addition of trastuzumab to non-anthracycline chemotherapy, whereas a shorter duration of trastuzumab should be not routinely considered although might represent an option for selected patients at low risk of relapse and very high risk of cardiac events. Therefore, the choice of adjuvant treatment for patients with pT1a-b pN0 HER2-positive breast cancer should be done on individual basis, carefully weighing benefits and risks.
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