Adjuvant trastuzumab emtansine (Kadcyla; T-DM1) showed higher rates of invasive-disease-free survival and overall survival as compared to trastuzumab (Herceptin) alone for patients with HER2-positive early breast cancer with residual invasive disease after neoadjuvant therapy, as demonstrated in results from the KATHERINE trial (NCT01772472).1
βThis prespecified long-term follow-up analysis provides additional support for the neoadjuvant therapy paradigm by showing that adjuvant T-DM1 also provided a significant improvement in overall survival and no evidence of long-term safety issues,β wrote KATHERINE investigators in The New England Journal of Medicine.