MEG3 and neoplasm: Multiple lncRNAs regulate VEGF expression in tumor cells under various conditions, including Testis Development-Related Gene 1 (TDRG1), MEG3, H19, SNHG1, Non-Coding RNA Activated by DNA Damage (NORAD), Antisense Non-Coding RNA in the INK4 locus (ANRIL), and MALAT1.