Based on this system, patients with HCC have a 70% chance of HCC-specific 5-year survival after transplantation, their level of AFP should be less than 200 ng/mL, and the sum of number and size of tumors (in centimeters) should not exceed 7; if the level of AFP is 200–400 ng/mL, the sum of the number and size of tumors should be less than 5; if their level of AFP is from 400 to 1000 ng/mL, the sum of the number and size of tumors should be less than 4 [12]. Here, AFP is linked to hepatocellular carcinoma.