CCAT2 and esophageal squamous cell carcinoma: Recent evidences have showed that upregulated expression of CCAT2 contributed to various human cancers development, such as cervical cancer [27], non-small cell lung cancer [28], gastric cancer [11], esophageal squamous cell carcinoma [9, 29], etc. However, little is known about the correlation between aberrant expression of CCAT2 and biological function in glioma.