In vitro antitumor activity of TIL from oligoclonal HCC: a, in vitro killing rate of different TIL culture methods on autologous tumor cells (Control: control group; TIL: conventional TIL treatment group; TIL△: oligoclonal TIL treatment group; n = 30); b, in vitro killing rate of different TIL culture methods on normal liver cells (Control: control group; TIL: conventional TIL treatment group; TIL△: oligoclonal TIL treatment group; n = 3); c, the neoplasia ability was detected by colony formation assay. *P < 0.05 (HCC cells, n = 6; normal liver cells, n = 3);d, correlation analysis of Treg ratio in TIL and concentration of IFN-γ.