TP73 and esophageal squamous cell carcinoma: TP73-AS1 and butyrate dehydrogenase 2 (BDH2) were both up-regulated in esophageal squamous cell carcinoma (ESCC) tissue samples, while the expression of TP73-AS1 was obviously correlated both with tumor lymph node metastasis (TNM) stage and tumor location, BDH2 expression was only statistically associated with TNM stage.