GLI1 and esophageal squamous cell carcinoma: Recently, studies have found that the expression of certain genes, such as MCT4, ZNF750, Gli1, etc. was highly related to the occurrence and development of ESCC, and they might be applied as ideal biomarkers for ESCC (Cheng et al., 2018; Nambara et al., 2017; Yang et al., 2017; Zhang et al., 2018b).