TNM staging of liver cancer is carried out with the help of imaging, in which T refers to tumor, N refers to lymph nodes and M refers to the presence or absence of distant metastasis. TNM staging of liver cancer refers to the staging of liver cancer with the help of imaging means, in which T refers to tumor, N refers to lymph nodes and M refers to the presence of distant metastasis. 1. Among them, the T stage can be divided into T0~T4 stages according to the size and number of tumors, which represent the tumors from none to very large, respectively. 2. The staging of N can be divided into N0 and N1, with N0 indicating no lymph node metastasis and N1 indicating the presence of metastasis near the liver or distant lymph node metastasis. 3. The staging of M can be divided into M0 and M1, M0 means no distant metastasis, and M1 means the appearance of metastasis to distant organs or sites, such as lungs, abdominal cavity, bones, brain and so on. There are other staging criteria for liver cancer, including clinical staging, Barcelona staging, the more commonly used ones are clinical staging and TNM staging.