Updated exploratory results from the TOPAZ-1 Phase III trial showed AstraZeneca’s Imfinzi (durvalumab) in combination with standard-of-care chemotherapy demonstrated a clinically meaningful long-term overall survival (OS) benefit at three years for patients with advanced biliary tract cancer (BTC).

These results from TOPAZ-1, which are the longest survival follow-up ever reported for a global, randomised Phase III trial in this setting, will be presented on 18 April at the 2024 Cholangiocarcinoma Foundation Conference in Salt Lake City, Utah.

Do-Youn Oh, MD, PhD, Professor, Division of Medical Oncology, Department of Internal Medicine at Seoul National University Hospital and Seoul National University College of Medicine, and principal investigator in the trial, said: “The latest data from TOPAZ-1 show that twice as many patients with advanced biliary tract cancer were still alive at three years with durvalumab and chemotherapy, an especially meaningful advance in a setting where historically the prognosis has been poor. These results reinforce the long-term benefit of this immunotherapy-based combination as a standard of care for patients with this devastating disease.”

Susan Galbraith, Executive Vice President, Oncology R&D, AstraZeneca, said: “TOPAZ-1 raised the bar for the treatment of advanced biliary tract cancer, showing a remarkable survival benefit for Imfinzi added to chemotherapy with a well-tolerated regimen. These data represent the longest survival follow-up reported for immunotherapy in this setting, and the three-year landmark survival improvement underscores our commitment to improving long-term outcomes in gastrointestinal cancers.”

Stacie Lindsey, CEO, Cholangiocarcinoma Foundation said: “AstraZeneca’s longer survival data in advanced biliary tract cancer represents a meaningful milestone in that we are seeing three-year survival data for the first time for these patients. The data spurs hope that research will continue to improve outcomes for patients living with these challenging and rare cancers.”