Liver cancer is the growth and spread of unhealthy cells in the liver. Cancer that starts in the liver is called primary liver cancer. Cancer that spreads to the liver from another organ is called metastatic liver cancer. Hepatocellular carcinoma (HCC) is the most common type of primary liver cancer.
About 30,000 Americans are diagnosed with primary liver cancer each year. Primary liver cancer is one of the cancers on the rise in the United States. Primary liver cancer is about twice as common in men than in women.