Liver cancer is a type of cancer that starts in the liver. Some cancers develop outside the liver and spread to the area. However, only cancers that start in the liver are described as liver cancer. The liver, which is located below the right lung and under the ribcage, is one of the largest organs of the human body. It has a range of functions, including removing toxins from the body, and is crucial to survival. Liver cancer consists of malignant hepatic tumors in or on the liver. In the United States, around 22,000 men and 9,000 women are diagnosed with liver cancer every year. It is fatal in around 17,000 men and 8,000 women per year.