HAVCR2 and neoplasm: After approximately 30 days, the tumor volumes in the PBS control group and control exNK group were 346 ± 26 mm3 and 198 ± 27 mm3, respectively, whereas the tumor volumes in the exNK + anti-Tim3 group was only 37 ± 11 mm3, showing an 81.3% inhibition ratio (p < 0.01, compared with the control exNK group).