HOTAIR and cancer: By comparing cancer samples with normal samples, we identified 926 cancer-related lncRNAs, such as FEZF1-AS1 (Liu Y.W. et al., 2017), HOTAIR (Okugawa et al., 2014), HOXA11-AS (Sun et al., 2016), HOTTIP (Zhao et al., 2018), and LINC01234 (Chen X. et al., 2018) have been reported to play important roles in GC.