Among the key B cell related cytokines identified in MG, both B-cell Activating Factor (BAFF) and A PRoliferation-Inducing Ligand (APRIL), members of the tumor necrosis factor (TNF) superfamily (7, 8), have been found to be upregulated in MG patients compared to healthy controls (9, 10). The gene discussed is TNFSF13; the disease is myasthenia gravis.