IHPBA concordant classification of primary liver cancer: working group report.

The working group of the International Scientific Committee of the International Hepato-Pancreato-Biliary Association(IHPBA) examined conventional staging systems and decided to establish a new staging system that depended on macroscopic findings after liver resection. The TNM/International Union Against Cancer (UICC) classification has been widely used but is too complicated. Vauthey and colleagues, and the Liver Cancer Study Group of Japan (LCSGJ) have proposed new simplified classifications.