HCC is the acronym for primary hepatocellular carcinoma. The difference between HCC and common liver cancer mainly lies in the scope and defined nature, as follows: First, the scope included is different. Common liver cancer refers to all malignant tumors originating from the liver, and in clinical practice, it mainly includes two major categories: first, HCC originating from hepatocytes; second, cholangiocarcinoma originating from intrahepatic bile duct epithelium carcinoma. HCC accounts for 90% of common liver cancer, and the other 10% is cholangiocellular carcinoma which originates from bile duct cells, so the clinical term hepatocellular carcinoma refers to primary hepatocellular carcinoma, i.e. HCC.