IL6 and esophageal squamous cell carcinoma: As can be observed from Figure 1, the expression of IFN-γ in esophageal squamous cell carcinoma of group A was significantly lower than that of group B, while the expressions of STK11, IL-6, and VEGF were significantly higher than those of group B. The expression of the internal reference gene U6 in the ESCC tissues of group A and group B was almost the same.