XIST and diffuse large B-cell lymphoma: HOTAIR and XIST levels were significantly upregulated with a median fold change = 3.77, P = 0.0004 and 2.265, P = 0.003, respectively, whereas GAS5 expression was significantly downregulated with a median fold change = 0.159 (P < 0.0001) in the overall DLBCL patients compared to the control group.