PTGDR and neoplasm: Our results showed that the expressions of DGCR9, PAXIP1-AS2, and SNHG18 were higher in the tumor tissues (P < 0.05) (Figures 7O–Q), while the expressions of CTD-2201I18.1, DICER1–AS1, and ZBTB20–AS4 showed no difference (Supplementary Figures 1O–Q).