The two major signaling cascades we identified, TGFβ signaling through its signal transducers SMADs and circadian rhythm regulation by RORA and Rev-ErbA, integrate immunoglobulin trait modulation, TH17 cell differentiation, and bone morphogenesis, and may provide a mechanistic link between the predisposition markers and intrinsic multiple myeloma biology. This evidence concerns the gene TGFB1 and plasma cell myeloma.