['Clinical determinants of liver regeneration induced by portal vein embolization (PVE) and hepatectomy remain unclear. The aims of this study were to investigate how liver regeneration occurs after PVE followed by hepatectomy and to determine which factors strongly promote liver regeneration.', 'Thirty-six patients who underwent both preoperative PVE and major hepatectomy were enrolled in this study. Percentage of future liver remnant volume before PVE (%FLR-pre) was compared with the remnant liver volume after PVE (%FLR-post-PVE) and on postoperative day 7 after hepatic resection (%FLR-post-HR). Clinical indicators contributing to liver regeneration induced by both PVE and hepatectomy were examined by logistic regression analysis.', 'PVE and hepatectomy caused a two-step regeneration. FLR-pre, FLR-post-PVE, and FLR-post-HR were 448, 579, and 761 cm(3), respectively. The %FLR-pre was significantly associated with liver regeneration induced by both PVE and hepatectomy (r\u2009=\u20090.63, p\u2009<\u20090.0001). Multiple regression analysis showed that only %FLR-pre was independently correlated with posthepatectomy liver regeneration (p\u2009=\u20090.027, odds ratio\u2009=\u200913.8).'] Does percentage of future liver remnant volume before portal vein embolization influence the degree of liver regeneration after hepatectomy?