PAX1 and esophageal squamous cell carcinoma: Another study showed that levels of PAX1 methylation were significantly higher in esophageal squamous cell carcinoma (Huang, Wang, et al., 2017), colorectal cancer (Huang, Tan, et al., 2017), and head and neck squamous cell carcinoma (Guerrero‐Preston et al., 2014), and the PAX1 protein levels were lower in endometrial carcinoma (Liu et al., 2016).