What is liver cancer? First, let's learn about a disease called cancer. Under normal conditions, cells grow, divide, and replace old cells to die. This is a well-organized process with a clear control mechanism. Sometimes this process is destroyed and begins to produce cells that the body does not need. The result is that the tumor can be benign or malignant. A benign tumor is not a cancer. They will not spread to other organs of the body, nor will they grow again after surgery. Although benign tumors are less dangerous than malignant tumors, they may have a significant impact on the body due to their location or pressure. Malignant tumor is already cancer. Cancer cells can penetrate adjacent tissues, affect them and pose a threat to life. They enter other parts of the body through direct transmission, blood flow or lymphatic system. So, liver cancer. Malignant formation in hepatocytes is called primary liver cancer. In most cases, it begins with liver cells (hepatocytes), which are called hepatocellular carcinoma (HCC) or malignant hepatitis (HCC). Hepatocellular carcinoma accounts for 80% of primary liver cancer. It is the fifth largest malignant tumor in the world and the third largest cause of cancer death.