LEF1 and lung cancer: LEF1-AS1 is a recently discovered lncRNA, which is lowly expressed in myeloid malignancies but highly expressed in glioblastoma, lung cancer, hepatocellular carcinoma, osteosarcoma, colorectal cancer, oral squamous cell carcinoma, prostate cancer, retinoblastoma (Cheng et al., 2020a, 2020b; Congrains-Castillo et al., 2019; Gao et al., 2020; He & Qin, 2020; Li et al., 2020; Lu, Qiao & Liu, 2020; Xiang et al., 2020; Zhang et al., 2019a), and other malignancies.