Abstract
New criteria for T, N and M categories and characteristics of the stages of hepatocellular carcinoma and intrahepatic cholangiocarcinoma are presented in the eighth edition of the international TNM classification of malignant tumors in 2017. The differences of this classification from the previous seventh edition of 2009 are noted, due to the receipt of new data on the survival of patients. The main characteristics of the primary tumor remained its size, the number of nodes and the presence of vascular invasion.
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