Liver cancer is the development of malignant cells in the liver. It can be a primary cancer, meaning it starts in the liver, or a secondary cancer, meaning it has spread to the liver from another part of the body, usually from the colon, rectum, lung, breast, or pancreas. Liver cancer is the sixth leading cause of cancer death in the United States, and it is more common in men than in women.
There are a number of risk factors for liver cancer, including: