Reports indicate that numerous tumor cell types express BAFF, including B cell chronic lymphocytic leukemia (B-CLL) [15], [26], diffuse large B-cell lymphoma (DLBCL) [15], FL [15], mantle cell lymphoma [15], and pre-B acute lymphoblastic leukemia [27]. This evidence concerns the gene TNFSF13B and diffuse large B-cell lymphoma.