Long non-coding RNAs musculoaponeurotic fibrosarcoma oncogene family, protein G antisense 1 (lnc-MAFG-AS1), which belongs to non-coding RNAs that lack protein-coding ability with a length of more than 200 bp, has been recently discovered to be an oncogene in several cancers (7–12). The gene discussed is MAFG; the disease is cancer.