The checkpoint inhibitor Imfinzi (durvalumab), in combination with chemotherapy, reduced the risk of death by 20% in a Phase 3 trial of patients with advanced biliary tract cancer, the developer AstraZeneca Plc announced on 18 January. The multicentre trial compared Imfinzi and chemotherapy, with chemotherapy alone as a first-line treatment. Called TOPAZ-1, the trial enrolled 685 patients with unresectable cancer, including gallbladder cancer.