The combination of trastuzumab-pkrb, an anti-HER2 monoclonal antibody, and GemCis resulted in high overall response (50%) and disease control (100%) rates in HER2-positive advanced BTC patients without new safety issues….The median follow-up duration of these patients was 10.5 months (95% CI, 5.3–13.7), the ORR was 17.2% with all partial responses and the DCR was 69.0%.