The phase 3 LILAC Study compared ABP 980 with trastuzumab (TRAS) on pathologic complete response (pCR) in women with HER2+ early breast cancer....pCR was achieved in 48.0% for ABP 980 and 40.5% for TRAS, based on local review. RD of pCR was 7.3% (90% CI: 1.2%, 13.4%); RR was 1.19 (90% CI: 1.033, 1.366). The upper limit of the CIs slightly exceeded the equivalence margin. Based on central review, pCR was achieved in 47.8% for ABP 980 and 41.8% for TRAS