MALAT1 and cancer: Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), a well-recognized lncRNA related to several diseases, including cancer, has increasingly received consideration In 2003, MALAT1 was firstly recognized to be significantly related to the metastasis of early-stage non-small cell lung cancer (NSCLC), and thus MALAT1 was suggested to be a predictive marker for stage I NSCLC (148).