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The purpose of this review is to discuss the classification, diagnosis and management of juvenile-onset spondyloarthritis.There have been changes in the classification criteria for juvenile-onset spondyloarthritis and magnetic resonance imaging has allowed for earlier detection of disease. Additionally, tumor necrosis factor-α blockers have been shown to be effective in the treatment of ankylosing spondylitis. There is evidence to suggest that early treatment may lead to better response. A high percentage of patients with enthesitis-related arthritis progress to develop ankylosing spondylitis within 10 years after presentation. Patients with juvenile-onset ankylosing spondylitis appear to have poorer functional outcomes.Juvenile-onset spondyloarthritis has variable clinical features that may lead to significant impairments. Improved classification criteria exist, but better techniques that are more sensitive are needed to diagnose disease earlier. New therapies appear to improve outcomes, but randomized controlled trials are needed in this population of patients.