PCAT1 and esophageal squamous cell carcinoma: LncRNA PCAT-1 is up-regulated and could play an oncogenic role in multiple cancers, such as prostate cancer, ESCC, gastric cancer, ovarian cancer (Prensner et al., 2011; Shi et al., 2015; Bi et al., 2017; Ding et al., 2019).