MALAT1 and Miyoshi myopathy: Numerous aberrantly expressed lncRNAs have been testified as potential prognostic indicators for MM patients, including prostate cancer‐associated transcript 1 (PCAT1),15 urothelial cancer‐associated 1 (UCA1),16 P53 regulation‐associated lncRNA (PRAL),17 antisense noncoding RNA in the INK4 locus (ANRIL),18, 19 and metastasis‐associated lung adenocarcinoma transcript 1 (MALAT1).20, 21