Juvenile enthesitis related arthritis

**Definition:** Enthesitis-related arthritis is a type of juvenile idiopathic arthritis (JIA) that represents the paediatric form of spondyloarthropathy in adults, but differs from it as the initial manifestations in the paediatric form are asymmetric oligoarticular arthritis of the lower limbs, associated with enthesitis. Axial manifestations (sacroiliac involvement) are present in only 25% of cases at onset but appear several years later in the disease course.