Using the same approach of testing genetic associations previously applied in adult psoriatic arthritis in 1244 JIA cases, of whom 93 had JPsA, and 5200 controls, Hinks et al. identified a negative association between JPsA and a SNP linked to the minor protective allele of interleukin 23R, the IL-23 receptor gene, which was not observed in the overall JIA cohort or in different JIA subtypes [34]. The gene discussed is IL23R; the disease is juvenile idiopathic arthritis.