Wu et al. found that the pattern of high lncRNA DLEU2 expression or low miR-30a-5p expression was an unfavourable prognostic factor for survival and tumour recurrence in patients with non-small cell lung cancer and showed that the lncRNA DLEU2 accelerates the development of cancer by sponging miR-30a-5p [24]. This evidence concerns the gene DLEU2 and cancer.