( Classification】 Ankylosing spondylitis Reiters syndrome Arthropathy of inflammatory bowel diseases Psoriatic arthritis Reactive arthritis Undifferentiated spondyloarthropathies【Classification】 • Ankylosing spondylitis • Reiter’s syndrome • Arthropathy of inflammatory bowel diseases • Psoriatic arthritis • Reactive arthritis • Undifferentiated spondyloarthropathies