CD274 and gastric cancer: With regard to the combined positive score (CPS) of PD-L1 expression, there was no significant difference in CPS between patients with SRC and without SRC (0.49 ± 1.48 vs. 0.92 ± 2.56, p = 0.166), which was observed in both early GC (0.40 ± 1.13 vs. 0.43 ± 1.30, p = 0.915) and advanced GC (0.54 ± 1.65 vs. 1.09 ± 2.87, p = 0.199).