Overview GEM/Cisplatin/S-1 vs GEM/Cisplatin for Biliary Tract Cancer Status: Completed Trial end date: 2018-04-16 Target enrollment: Participant gender: Summary To validate the superiority of Gemcitabine/Cisplatin/S-1 over Gemcitabine/Cisplatin for unresectable biliary tract cancer. Phase: Phase 3 Details Lead Sponsor: Kansai Hepatobiliary Oncology GroupTreatments: CisplatinGemcitabineS 1 (combination)Tegafur