Toripalimab With or Without Lenvatinib or Chemotherapy in First-Line Treatment of Advanced Biliary Tract Cancer

Toripalimab 240mg, intravenous infusion every 3 weeks until disease progression or occurrence of intolerable toxicity.

When the body weight is ≥60 kg, the dosage of Lenvatinib is 12mg qd, when body weight \< 60kg the dosage is 8mg qd.

"Chemotherapy drugs: GC regimen is preferred, and if patients cannot tolerate it, GEMOX regimen is used.~Gemcitabine + oxaliplatin (GEMOX) regimen chemotherapy: every 21 days (3 weeks), 1000 mg/m2 of gemcitabine was administered intravenously for more than 30 min on the 1st and 8th day, and 100 mg/m2 of oxaliplatin was administered intravenously for 2h on the 1st day Gemcitabine + cisplatin (GC) regimen chemotherapy: 1250 mg/m2 was administered intravenously for 30 min on day 1 and day 8, respectively, and 100 mg/m2 was administered intravenously for 2 hours after gemcitabine treatment on day 1."