Log-rank analysis showed that the RFS was significantly longer in patients with tumor diameter ≤5 cm (P = 0.027), mitotic index ≤5/50HPF (P <0.001) (Supplementary Figure 3), spindle cell type (P = 0.004), high expression of PD-L1 (P <0.001), and high CD8+ T cell infiltration (P = 0.003) (Figure 3). Here, CD274 is linked to neoplasm.