[Epidemiology of primary and secondary liver cancers].

Most primary liver cancers are hepatocellular carcinomas (HCC) or cholangiocarcinomas. In clinical practice, the majority of secondary liver cancers are metastases from colorectal cancer. The HCC incidence rate is constant in Denmark (2 per 100,000 per year), which is lower than in many other countries due to the low prevalence of viral hepatitis. The incidence rate of cholangiocarcinoma is slightly lower, and decreasing. The incidence rate of liver metastases is at least 40 per 100,000 per year. The prognosis for patients with liver cancer is poor, but seems to be improving.