An increase in the prevalence of obesity and diabetes mellitus has been associated with the rise in non alcoholic fatty liver disease (NAFLD). Twothirds of the obese and diabetic populations are estimated to develop NAFLD. Currently, NAFLD is the most common etiology for chronic liver disease globally. The clinical spectrum of NAFLD ranges from simple steatosis, an accumulation of fat greater than 5% of liver weight, to nonalcoholic steatohepatitis (NASH), a more aggressive form with necroinflammation and fibrosis. Among the patients who develop NASH, up to 20% may advance to cirrhosis and are at risk for complications of endstage liver disease. One of the major complications observed in patients with NASHrelated cirrhosis is hepatocellular carcinoma (HCC), which has emerged as the sixth most common cancer and second leading etiology of cancerrelated deaths worldwide. The incidence of HCC in the United States alone has tripled over the last three decades. In addition, emerging data are suggesting that a small proportion of patients with NAFLD may be at higher risk for HCC in the absence of cirrhosis implicating obesity and diabetes mellitus as potential risk factors for HCC. Core tip: The worldwide rise in overweight and obesity has been associated with increasing rates of nonalcoholic fatty liver disease (NAFLD), which is now the most common etiology of chronic liver disease.
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