- (1) age <18 years or> 70 years , pregnant or lactating women; (2) tumor size ≥10 cm, or tumor location that would interfere with intraoperative exposure and isolation of the hepatic hilum; (3) tumor encroaching on the hepatic hilum , the portal vein, primary bile duct or tumor adjacent to the major vascular structures ; (4) unable to tolerate a pneumoperitoneum or can't tolerate surgery duo to cardiopulmonary dysfunction; (5) severe upper abdominal adhesions; (6)Pathologically confirmed positive margins