The KD-associated FCGR2A SNP (rs1801274; A/G, p.His167Arg, previously assigned as p.His131Arg) is associated with autoimmune diseases such as ankylosing spondylitis [148], SLE [149], inflammatory bowel disease (IBD) [150,151,152], and KD [123]. The gene discussed is FCGR2A; the disease is systemic lupus erythematosus.