XIST and cancer: Our candidate list contains lncRNAs that have a wide range of expression and also contains several previously identified lncRNAs that have been found to be dysregulated in cancer (NEAT1, FIRRE, XIST, DANCR, and GAS5), verifying the validity of the approach (Figure 1—figure supplement 1A; Ji et al., 2019; Soudyab et al., 2016; Yuan et al., 2016).