Table 4.
Relationship of PD-L1 expression on tumor infiltrating immune cells and several pathological variables in the resection specimens (Cohort A)
| PD-L1 positive in tumor infiltrating immune cells | Yes ( n = 29) | No ( n = 18) | p |
|---|---|---|---|
| Liver capsule invasion (yes), n (%) | 17 (58.62) | 11 (61.11) | 0.866 |
| Tumor differentiation | 0.856 | ||
| Good | 5 (17.24) | 3 (15.79) | |
| Moderate | 16 (55.17) | 9 (47.37) | |
| Poor | 8 (27.59) | 7 (36.84) | |
| Perineural invasion (yes), n (%) | 18 (60) | 11 (61.11) | 0.939 |
| Lymphatic invasion (yes), n (%) | 15 (50) | 11 (57.89) | 0.59 |
| Venous vascular invasion (yes), n (%) | 14 (46.67) | 7 (36.84) | 0.498 |
| Positive resection margin (yes), n (%) | 13 (43.33) | 11 (61.11) | 0.233 |
| Tumor stage (I and II) n (%) | 14 (48.28) | 8 (42.11) | 0.675 |
| Multiple tumors | 7 (23.33) | 12 (63.16) | 0.005 |
PD-L1 = programmed death ligand 1; n = number; % = percent; p = level of significance