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A liver metastasis is a malignant tumor in the liver that has spread from another organ affected by cancer. The liver is a common site for metastatic disease because of its rich, dual blood supply (the liver receives blood via the hepatic artery and portal vein). Metastatic tumors in the liver are 20 times more common than primary tumors. In 50% of all cases the primary tumor is of the gastrointestinal tract, other common sites include the breast, ovaries, bronchus and kidney.
A liver metastasis is a cancerous tumor that has spread to the liver from another place in the body. It is also called secondary liver cancer. Primary liver cancer originates in the liver. Most of the time, liver cancer is secondary. The cancer cells found in a metastatic liver tumor are not true liver cells.