NORAD and cancer: The relationship between NORAD expression and tumor tissues was previously observed in different types of cancer, in which the poorest prognosis was associated not only when NORAD was up-regulated (Li H et al., 2017; Wu et al., 2017; Huo et al., 2018; Li Q et al., 2018; Zhang et al., 2018) but also when it was downregulated (Hu et al., 2017).