Title Search [OP 6-1] Grading severity of microscopic vascular invasion was independently associated with recurrence and survival following hepatectomy for solitary hepatocellular carcinoma Tian YANG (Eastern Hepatobiliary Surgery Hospital, China) [OP 6-2] 3D auto-segmentation of liver anatomy based on liver MRI using deep learning algorithm based on 114 cases undergoing liver resection: Five different anatomical structures from single sequence Namkee OH (Sungkyunkwan University, Korea) [OP 6-3] Human chemically derived hepatic progenitor cells organoids (hCdHOs) in the modeling disease and drug analysis studies Elsy Soraya SALAS SILVA (Hanyang University, Korea) [OP 6-4] Improving surgical outcome through fellowship training Jonathan NAVARRO (Vicente Sotto Memorial Medical Center, Philippines) [OP 6-5] Optimization of differentiation methods from various human-derived pluripotent stem cell lines to hepatocyte-like cells (HLCs) Jiyoon BYEON (Hanyang University, Korea) [OP 6-6] Role of preoperative 3D rendering for minimally invasive parenchyma sparing liver resections Roberto MONTALTI (Federico II University, Italy) [OP 6-7] A systematic review and meta-analysis of blood transfusion rates during liver resection by country Yun Kyung JUNG (Hanyang University, Korea)