In DLBCL cell lines, the expression of ELFN1‐AS1 was significantly upregulated in OCI‐LY8 and SU‐DHL‐6 cells compared to that in B cells (Figure 6B), and the expression of ELFN1‐AS1 in OCI‐LY8 and SU‐DHL‐6 cells was inhibited by siRNA transfection (Figure 6C,D). This evidence concerns the gene ELFN1 and diffuse large B-cell lymphoma.