Histological classification of liver and intrahepatic bile duct cancers in SEER registries.

Abstract

The proposed histological classification in this report may facilitate studies of primary liver cancers. This is of value because the inconsistent characterization of some cancers, particularly cholangiocarcinomas, may affect interpretation of incidence trends. Incomplete histological characterization of hepatocellular carcinomas was noted in this report. It is likely to be explained by guidelines affirming the use of non-invasive diagnostic and treatment procedures for this cancer.