Standardized liver volumetry for portal vein embolization.

Major and extended hepatic resections are being performed with increasing frequency as morbidity and mortality rates after major hepatectomies have declined and definitions of resectability have expanded for primary and metastatic hepatic malignancies. Systematic assessment of the anticipated functional remnant liver is essential before major hepatic resection to avoid postoperative hepatic insufficiency and its attendant sequelae. The volume of the future liver remnant (FLR) correlates with FLR function and postoperative outcome. This article describes the rationale for FLR measurement, methods of measuring FLR volume, and standardization to the total estimated liver volume. The indications for portal vein embolization based on standardized liver volumetry are summarized.