52MO A randomized phase II trial of durvalumab and tremelIMUmab with gemcitabine or gemcitabine and cisplatin compared to gemcitabine and cisplatin in treatment-naïve patients with CHolangio- and gallbladdEr Carcinoma (IMMUCHEC)

Topaz-1 was the first phase-III study demonstrating efficacy for the PD-L1 inhibitor durvalumab (D) in combination with gemcitabine (Gem) and cisplatin (Cis), and the combination has the potential to become a new first-line standard of care in biliary tract cancers (BTCs). The aim of this proof-of-concept study was to evaluate the efficacy of tremelimumab (two dosing regimens) in combination with CTx+D.