Spondyloarthritis (SpA) is a related group of inflammatory joint diseases comprising axial SpA (axSpA), psoriatic arthritis (PsA), arthritis associated with inflammatory bowel disease, reactive arthritis and undifferentiated SpA [1]. These entities share clinical features like asymmetrical oligoarticular arthritis, sacroiliitis and/or spondylitis, enthesitis, dactylitis and/or uveitis.
