CASC9 and esophageal squamous cell carcinoma: To identify the specific lncRNAs involved, we selected 14 ESCC-related lncRNAs (AFAP1-AS1, CASC9, CCAT1, DNM3OS, FMR1-AS1, HNF1A-AS1, LINC01419, NMR, PART1, PCAT1, POU3F3, ROR, TTN-AS1, and TUG1) for this study (Table 1).