Types of liver cancer
Liver cancer is classified into two main types: primary and secondary.
Primary liver cancer starts from cells inside your liver and includes:
- Hepatocellular carcinoma, or hepatocellular cancer, is the most common type of primary liver cancer. It begins in cells in the liver called hepatocytes.
- Cholangiocarcinoma, also called bile duct cancer, starts growing from bile ducts, which carry substances in and out of the liver.
- Angiosarcoma, a rare type of liver cancer, develops in the cells that make up blood vessels.
- Hepatoblastoma, a rare type of liver cancer that also originates in hepatocytes, the main liver cells, usually only affects children ages three years and younger.
Secondary liver cancer is what doctors call cancer that spreads to the liver after developing in another part of your body. Doctors may also refer to secondary liver cancer as liver metastasis or stage IV cancer in the liver.
In the United States, secondary (or metastatic) liver cancer is more common than primary liver cancer. Colon cancer and rectal cancer are the sources of most metastatic liver tumors.