CASC9 and esophageal squamous cell carcinoma: These data provide strong evidence supporting an oncogenic role of CASC9 in CRC, in accordance with previous reports of CASC9 functioning as an oncogene in several other cancers, including hepatocellular carcinoma, esophageal squamous cell carcinoma, gastric cancer, ovarian cancer, glioma, and breast cancer [33–39].