The Changing Pathogenesis of Liver Cancer in Hawaii over Three Decades.

Abstract

Background: Worldwide trends support the increasing contribution of hepatic steatosis to the incidence of hepatocellular carcinoma (HCC). This study investigates if similar changes are seen in Hawaii, where the incidence of HCC is higher than in most of the United States.

Methods: This is a retrospective study of 1,651 patients diagnosed with HCC (1991-2023) that includes 60% to 70% of HCC cases in Hawaii. We evaluated changes in patient demographics, risk factors, and disease etiology over the past three decades.

Results: From 1991 to 2023, there were significant increases in the proportion of HCC cases attributable to metabolic dysfunction-associated steatotic liver disease (MASLD), coinciding with an increase in the prevalence of metabolic risk factors including obesity, diabetes, hyperlipidemia, and hypertension. Cases with a history of smoking also increased through 2020. Conversely, HCC cases presenting with cirrhosis alone decreased. Hepatitis C virus (HCV)-associated cases increased through 2015 and then tapered, whereas Hepatitis B virus (HBV)-associated cases decreased through 2020. There was no significant change in the proportion of alcohol-associated cases.

Conclusions: Although HBV continues to be a major contributor to HCC in Hawaii, HCV-related HCC cases have tapered, whereas metabolic risk factors for HCC and cases attributable to MASLD have increased over time, paralleling overall trends observed in the United States. Efforts are needed to manage these metabolic factors to address the burden of HCC.

Impact: Although Hawaii continues to have a large burden of viral hepatitis-related HCC, metabolic factors and MASLD have affected the pathogenesis of liver cancer in Hawaii over the past three decades.