The changing epidemiology of primary liver cancer.

PURPOSE OF REVIEW: In prior decades, liver cancer was viewed as a neoplasm that almost exclusively arose among high-risk populations in low- and middle-income countries. Incidence rates in some high-risk populations, however, have been declining, while rates in low-risk populations have been increasing, reflecting changes in underlying etiology. In this review, we highlight the evolving epidemiology of liver cancer, focusing on recent research and advances.

RECENT FINDINGS: Efforts to reduce or eliminate the risk associated with major risk factors such as hepatitis B virus (HBV), hepatitis C virus (HCV) and aflatoxin B1 (AFB1 ) have met with some success. As opposed to these favorable trends, the joint epidemics of obesity and diabetes have begun to affect liver cancer rates around the world.

SUMMARY: While there has been progress in combating the effects of some risk factors, the increasing prevalence of others poses a major threat to attempts to tackle the rising incidence of liver cancer globally.