Significantly elevated levels of BAFF were observed in the blood samples of patients with B-CLL, diffuse large B-cell lymphoma (DLBCL), follicular lymphoma (FL), cutaneous T-cell lymphoma (CTCL), acute myeloid leukemia (AML), acute lymphoblastic leukemia (ALL), non-Hodgkin’s lymphoma (NHL), and multiple myeloma (MM), compared with healthy donors [16–27]. The gene discussed is TNFSF13B; the disease is plasma cell myeloma.