Title Search [LV OP 4-1] Development and validation of novel scoring system for the prediction of disease recurrence following resection of colorectal liver metastasis Wan-Joon KIM (Korea University Guro Hospital, Korea) [LV OP 4-2] ALPPS versus two-stage hepatectomy (TSH): indications, safety, efficacy Aisha ISAEVA (Moscow Oncological Research Institute n.a.P.Hertsen, Russia) [LV OP 4-3] The clinical impact of applying BCLC guideline for the treatment of recurrent intrahepatic single and small sized hepatocellular carcinoma Hyo-Sin KIM (Chonnam National University Hospital, Korea) [LV OP 4-4] The current status of selecting treatment modalities for naiive hepatocellular carcinoma patients over 70 years old : Single-center experience Hyeo seong HWANG (Severance hospital, Yonsei University, College of Medicine, Korea) [LV OP 4-5] Predictive factors and treatment outcome for recurrent intra-hepatic cholangicarcinoma Yauren CHANG (Chang Gung Memorial Hospital, Taiwan) [LV OP 4-6] The impact of anatomical resection and preoperative positron emission tomography positivity on recurrence after hepatectomy for patients with primary solitary hepatocellular carcinoma Chan Woo CHO (Yeungnam University College of Medicine, Korea) [LV OP 4-7] Oncologic outcome of two stage hepatectomy in patients with bilobar multiple colorectal liver metastases Jin Hong LIM (Yonsei University College of Medicine, Gangnam Severance Hospital, Korea)