Neoadjuvant atezolizumab plus docetaxel, trastuzumab and pertuzumab therapy showed favorable efficacy and safety profiles in HER2-positive early breast cancer (EBC) in NEO-PATH phase 2 study, which provided evidence of combining immunotherapy and anti-HER2 treatment as a potential new therapeutic option. We evaluated potential genomic biomarkers in NEO-PATH trial....Pre-treatment RAD21 amplification (p=0.0002), MYC amplification (p=0.0095) and MYC pathway mutations (p=0.0095) were more frequently detected in non-pCR group (n=23) compared to pCR group (n=40), and co-amplification of ERBB2 and MYC were enriched in non-pCR group (p=0.01687).