Other relevant markers in esophageal cancer samples including CTLA-4, Her2, and OX40 were also evaluated for correlation with survival (Figures 1D–2F; Figures 2D–2F), however, differences in patient survival did not reach statistical significance with the exception of Her2 in AC (Figure 2E; P = 0.0076). This evidence concerns the gene CTLA4 and esophageal cancer.