De-escalated Neoadjuvant T-DM1 With or Without ET vs Trastuzumab With ET in Hormone Receptor–Positive/HER2-Positive Early Breast Cancer

De-escalated Neoadjuvant T-DM1 With or Without ET vs Trastuzumab With ET in Hormone Receptor–Positive/HER2-Positive Early Breast Cancer

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A 5-year follow-up from the phase II WSG-ADAPT-TP trial indicated that pathologic complete response was associated with better outcomes irrespective of receipt of adjuvant chemotherapy among patients with HR+, HER2+ early breast cancer receiving de-escalated neoadjuvant ado-trastuzumab emtansine with or without endocrine therapy vs trastuzumab plus endocrine therapy.