TUG1 and neoplasm: Moreover, lncRNA TUG1 (Yu et al., 2019), HOTAIR (Wang B. et al., 2015), DLX6-AS1 (Zhang N. et al., 2019) and HOTTIP (Li et al., 2015) are prominently increased in OS, which are associated with tumor size, distant metastases, TNM stage, overall survival and recurrence-free survival.