UCA1 and esophageal squamous cell carcinoma: It was reported that lncRNA LOC285194 was associated with larger tumor size, advanced TNM stage, more lymph node metastases and distant metastases [18], etc. Several lncRNAs including Prostate Cancer-Associated ncRNA Transcript 1 (PCAT-1) [19], Urothelial Carcinoma Associated 1 (UCA1) [20] and SPRY4-IT1 [21] were significantly increased in ESCC tissues and their high expressions were significantly correlated with the tumor invasion, advanced clinical stage, lymph node metastasis and poor prognosis.