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HEPATOCELLULAR CARCINOMA

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INCIDENCE

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Image not available. Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide. The annual global incidence is approximately 1 million cases, with a male-to-female ratio of approximately 4:1 (1:1 without cirrhosis to 9:1 in many high-incidence countries). The incidence rate equals the death rate. In the United States, approximately 22,000 new cases are diagnosed annually, with 18,000 deaths. The death rates in males in low-incidence countries such as the United States are 1.9 per 100,000 per year; in intermediate areas such as Austria and South Africa, they range from 5.1–20; and in high-incidence areas such as in the Orient (China and Korea), they are as high as 23.1–150 per 100,000 per year (Table 111-1). Incidence was 6 per 100,000, of whom 73% were males with a median age of 63 years. Overall 5-year survival was 17%, being better in females. Thus, 1-year survival was 60% for males and 80% in females. However, this covers great heterogeneity with respect to geography, ethnicity and especially stage at diagnosis and therefore the possibility of surgical therapy. These numbers are rapidly increasing and may be an underestimate. Approximately 4 million chronic hepatitis C virus (HCV) carriers are in the United States alone. Approximately 10% of them, or 400,000, are likely to develop cirrhosis. Approximately 5%, or 20,000, of these patients may develop HCC annually. Add to this the two other common predisposing factors—hepatitis B virus (HBV) and chronic alcohol consumption—and 60,000 new HCC cases annually seem possible. Future advances in HCC survival will likely depend in part on immunization strategies for HBV (and HCV) and earlier diagnosis by screening of patients at risk of HCC development.

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Table Graphic Jump Location
TABLE 111-1Age-Adjusted Incidence Rates for Hepatocellular Carcinoma
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Current Directions
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With the U.S. HCV epidemic, HCC is increasing in most states, and obesity-associated liver disease (nonalcoholic steatohepatitis [NASH]) is increasingly recognized as a cause.

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EPIDEMIOLOGY

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Image not available. There are two general types of epidemiologic studies of HCC—those of country-based incidence rates (Table 111-1) and those of migrants. Endemic hot spots occur in areas of China and sub-Saharan Africa, which are associated both with high endemic hepatitis B carrier rates as well as mycotoxin contamination of foodstuffs (aflatoxin B1), stored grains, drinking ...

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