FIGURE 1. Decision criterion of strategy for preoperative management in perihilar cholangiocarcinoma. PCC, perihilar cholangiocarcinoma; PTBD, percutaneous transhepatic biliary drainage; PD, combined pancreaticoduodenectomy; VR, combined vascular resection and reconstruction; ICG R15, indocyanine green retention value at 15 minutes; PVE, portal vein embolization; HBR, hepatobiliary resection; T.Bil, serum total bilirubin level. #Three patients who did not undergo PVE due to the hepatic lobar atrophy to be resected or the portal vein stricture to be embolized were excluded.