LINC00261 and hepatocellular carcinoma: LINC00261 is a tumor suppressor positively associated with prognosis in many tumors, such as hepatocellular carcinoma (Zhang, Li & Han, 2018a), endometrial carcinoma (Fang, Sang & Du, 2018) and non-small cell lung (Liu, Xiao & Xu, 2017).