proposed a concept of immunoscore which not only refers to the tumor's TNM staging but also includes TILs.66 It is a scoring system which is used to describe the density of CD3+ and CD8+ T cells and their invasive margin.67 One study investigated the relationship between TILs and PD‐L1 expression and the prognosis of esophageal cancer. This evidence concerns the gene CD274 and esophageal cancer.