GWAS have found that there were significant associations between FCGR2A rs1801274 and Kawasaki disease72 and Inflammatory bowel disease (P = 2.12 × 10−38, OR = 1.12)73 and there were genome-wide significant associations between the SNP and Ulcerative colitis in European74, and Japanese population75. This evidence concerns the gene FCGR2A and inflammatory bowel disease.