XIST and cancer: Exosomal lncRNA like MALAT1 (Liu J. et al., 2021), growth arrest-specific 5 (GAS5) (Patel et al., 2022), H19 (Wang et al., 2020), HOTAIR (Yang et al., 2019), small ubiquitin-like modifier 1 SUMO1 pseudogene 3 (SUMO1P3) (Li et al., 2021b) and X-inactive specific transcript (XIST) (Lan et al., 2021) were previously shown upregulated in the blood, lung and breast tissues of cancer patients (Li et al., 2021b).