15 3.2.4. extra-survival time of HCC patients with PVT - The mean overall survival time (OS) was 8.6 ± 7.8 months, and minimum of this was 1 month, the maximum of this is 51 months, in which <3 months accounted for 30.7%, 3 - 6 months accounted for 20.8%, 6 - 12 months accounted for 20.8%, 13 - 24 months accounted for 23.8% and 24 months accounted for 4.0%.