Asian patients with advanced hepatocellular carcinoma were able to live longer after being treated with Keytruda (pembrolizumab), one of the most widely prescribed checkpoint inhibitors for cancer. A Phase 3 trial of 453 patients with the disease achieved an overall survival rate of 21%, potentially acting as a confirmatory study for an accelerated approval given to Keytruda for this indication in the US, the developer Merck & Co Inc announced on 18 January.