Robotic-Assisted Laparoscopic Versus Open Surgery for Complicated Hepatolithiasis

Inclusion Criteria: 1. Patients with intrahepatic bile duct stones or hepatolithiasis. 2. Liver function \> Child-pugh level B, no severe biliary cirrhosis, ICG ≤ 15%, the residual liver volume and standard liver volume ratio ≥ 40%. The conditions of open hepatectomy were achieved 3. Age: Between 18 to 70 years 4. Combined with severe liver atrophy hypertrophy syndrome, hepatic portal transposition or hilar biliary fibrosis / stenosis 5. Patients with good general condition, the conditions of open Anatomical Hepatectomy were achieved 6. Other organ lesions and previous biliary tract operation is not the absolute exclusion criteria 7. Written informed consent Exclusion Criteria: 1. Patients with bad general condition or important organ lesions, liver resection could not be tolerated 2. Age:Younger than 18 or more than 70 years old 3. Malignant tumor recurrence within one month postoperation 4. Complicated case need to get emergency operation 5. Contraindication of laparoscopy: Combined with complicated acute cholangitis, repeated biliary tract operation, heavy intra-abdominal adhesion, Trocar can not be placed in. Artificial pneumoperitoneum could not be tolerated