DSCAM-AS1 and lung carcinoma: lncRNA are defined as transcripts longer than 200 nucleotides that are not translated into protein.19 Although DSCAM‐AS1 is a newly reported cancer‐related lncRNA, it was first described as a mRNA in 2002, when it was determined to be expressed at a higher level in human breast cancer specimens than in normal human breast and benign lesions.8 It then lost attention until in 2014, when Weihong et al reported that DSCAM‐AS1 was differentially expressed in lung cancer.