We aim to explore the effects and safety of GC (Cisplatin and gemcitabine) chemotherapy combined with Lenvatinib as first-line therapy in advanced or unresectable intrahepatic cholangiocarcinoma

For advanced intrahepatic cholangiocarcinoma (ICC) that cannot be surgically removed or accompanied by metastasis, the NCCN guidelines (NCCN guidelines hepatobiliary cancer, 2019) recommend that the current treatment options are limited, mainly recommending gemcitabine combined with platinum based antitumor drugs (cisplatin, oxaliplatin, etc.) chemotherapy as first-line treatment. Adding targeted drugs can enhance the anti-tumor effect. GC chemotherapy (Cisplatin + gemcitabine) has been used in the treatment of advanced intrahepatic cholangiocarcinoma, but the efficacy is still not satisfactory. Lenvatinib is a small-molecule multikinase inhibitor that is currently approved for first-line treatment of advanced hepatocellular carcinoma. Lenvatinib combined with chemotherapy may have a better effect than single use for advanced ICC. At present, lenvatinib combined with GC chemotherapy in the first-line treatment of advanced ICC has not been reported.

Inclusion Criteria:

• 1. The patient must sign an informed consent form; 2. Age 18-75 years old, both male and female; 3. ECOG performance status score (PS score) 0 or 1; 4. Child-Pugh score A period; 5. Intrahepatic cholangiocarcinoma confirmed by histopathology; agree to provide previously-stored tumor tissue specimens or fresh biopsy tumor lesions; 6. Unresectable ICC patients or postoperative diagnosis of ICC recurrence and metastasis, have not received systemic treatment within 6 months; 7. The functional indicators of important organs meet the following requirements Neutrophils≥1.5*109/L; platelets≥100*109/L; hemoglobin≥9g/dl; serum albumin≥3g/dl; T3, T4≤2 times the upper limit of normal value; Bilirubin ≤ 1.5 times the upper limit of normal; ALT and AST ≤ 3 times the upper limit of normal; Serum creatinine ≤ 1.5 times the upper limit of normal value, creatinine clearance ≥ 60ml/min (calculated by Cockcroft-Gault formula); 8. The subject has at least 1 measurable lesion (according to RECIST1.1); 9. For women who are not breastfeeding or pregnant, contraceptives during treatment or 3 months after the end of treatment.

Exclusion Criteria:

• 1. Pathological diagnosis of hepatocellular carcinoma, mixed hepatocellular carcinoma and other non-biliary cell carcinoma malignant tumor components; 2. Past or simultaneous suffering from other malignant tumors, except for fully treated non-melanoma skin cancer, cervical carcinoma in situ and thyroid papillary carcinoma; 3. Have used Lenvatinib or gemcitabine-based chemotherapy within 6 months; 4. Severe cardiopulmonary and renal dysfunction; 5. Hypertension that is difficult to control with drugs (systolic blood pressure (BP) ≥140 mmHg and/or diastolic blood pressure ≥90mmHg) (based on the average of ≥3 BP readings obtained by ≥2 measurements); 6. Abnormal coagulation function (PT>14s), have a bleeding tendency or are receiving thrombolysis or anticoagulation therapy; 7. After antiviral treatment, HBV DNA>2000 copies/ml, HCV RNA>1000; 8. History of esophageal and gastric varices, significant clinically significant bleeding symptoms or a clear tendency to appear within 3 months before enrollment; 9. Active infections requiring systemic treatment; patients with active tuberculosis infection within 1 year before enrollment; a history of active tuberculosis infection more than 1 year before enrollment, and no formal anti-tuberculosis treatment or tuberculosis Still in the active period; 10. Human immunodeficiency virus (HIV, HIV1/2 antibody) positive; 11. A history of psychotropic drug abuse, alcohol or drug abuse; 12. Known to have a history of severe allergies to any targeted anti-angiogenesis drugs, platinum or gemcitabine; 13. Other factors judged by the investigator that may affect the safety of the subjects or the compliance of the trial. Such as serious diseases (including mental illness) that require combined treatment, severe laboratory abnormalities, or other family or social factors.