Enthesitis-Related Arthritis in Children Enthesitis-related arthritis (ERA) is an emerging subset of juvenile idiopathic arthritis (JIA) recognized for its distinctive clinical characteristics. ILAR has defined criteria… rheumnow.com Clinical features of children with enthesitis-related juvenile idiopathic arthritis / juvenile spondyloarthritis followed in a French tertiary care pediatric rheumatology centre ped-rheum.biomedcentral.com