Upon binding of the ligands to BCMA, multiple growth and survival signaling cascades are activated in MM cells, most frequently nuclear factor κ-light-chain enhancer of activated B cells (NF-κβ), but also including rat sarcoma/mitogen-activated protein kinase (RAS/MAPK), and phosphoinositide-3-kinase–protein kinase B/Akt (PI3K-PKB/Akt) signaling pathway [37, 52, 53]. The gene discussed is TNFRSF17; the disease is Miyoshi myopathy.