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New study confirms link between nonalcoholic steatohepatitis and liver cancer
Date:5/25/2010

A study conducted by researchers at the Cleveland Clinic finds that patients suffering from cirrhosis preceded by nonalcoholic steatohepatitis are at an equal risk of developing hepatocellular carcinoma than those who develop cirrhosis resulting from hepatitis C virus (HCV). Results of this study appear in the June issue of Hepatology, a journal published by Wiley-Blackwell on behalf of the American Association for the Study of Liver Diseases (AASLD).

The incidence of hepatocellular carcinoma (HCC) doubled in the United States between 1983 and 2002. It is currently considered the third leading cause of cancer deaths. The increasing incidence of HCC parallels the obesity epidemic. An estimated two-thirds of obese people have some form of fatty liver, including nonalcoholic steatohepatitis (NASH), which can progress to cirrhosis and subsequently HCC. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NASH affects 2% to 5% of Americans and ranks as one of the major causes of cirrhosis in the U.S., behind HCV and alcoholic liver disease.

The Cleveland Clinic team, led by Nizar N. Zein, M.D., evaluated a total of 510 patients, 315 with liver cirrhosis secondary to chronic HCV infection and 195 with NASH-induced cirrhosis, to compare the incidence of NASH-cirrhosis to HCV-cirrhosis, and to identify HCC risk factors in each group. Over a median follow-up time of 3.2 years after cirrhosis diagnosis, the yearly cumulative incidence of HCC was 2.6% per year in patients with NASH-cirrhosis compared to 4.0% per year in those with HCV-cirrhosis. These figures suggest that NASH carries a risk of HCC that rivals the risk in patients with HCV-cirrhosis.

Results indicate three factors that are statistically significant in the development of HCC within the NASH-cirrhosis group. An older age at time of cirrhosis diagnosis and a higher BMI were negatively associated with the development of HCC. Among the
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Contact: Dawn Peters
medicalnews@wiley.com
781-388-8408
Wiley-Blackwell
Source:Eurekalert

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