Tumor multifocality and serum albumin levels can identify groups of patients with hepatocellular carcinoma and portal vein thrombosis having distinct survival outcomes.

Background: Macroscopic portal vein thrombosis (PVT) is a major poor prognosis factor in patients with hepatocellular carcinoma (HCC), but constitute a heterogeneous group.

Aims: To examine blood and tumor parameters of 1667 HCC patients who had PVT to identify factors that could differentiate different survival subsets.

Methods: a large HCC database was examined for presence of patients with PVT and analyzed retrospectively for PVT-associated factors and prognosis.

Results: A logistic regression model was calculated for presence of PVT. Highest odds ratios were found for tumor multifocality and serum albumin levels, as well as serum alpha-fetoprotein (AFP) and bilirubin levels. A Kaplan-Meier and Cox model on survival also showed the highest hazard ratios for tumor multifocality and serum albumin. A model was constructed on all 4 possible combinations of tumor focality and serum albumin in PVT patients. The longest survival group had <2 tumor nodules plus serum albumin >3.5 g/dL. Conversely, the shortest survival group had >2 tumor nodules plus serum albumin <3.5 g/dL. These 2 patient groups differed in maximum tumor diameter and levels of serum AFP, AST and bilirubin.

Conclusions: Combination low tumor focality and high serum albumin identifies prognostically better PVT patient subgroups that might benefit from aggressive therapies.