In both well and moderately/poorly differentiated subgroups with similar tumor lengths, patients with positive PD-L1 expression had poorer DFS (p = 0.043 and 0.022, respectively) and OS (p = 0.009 and 0.032, respectively) compared to patients with negative PD-L1 expression (Figure S3A–S3D and S4A–S4D). Here, CD274 is linked to neoplasm.