Spondyloarthropathy classification

Classification

spondyloarthropathies (SpA) are a group of inflammatory arthritis that consist of ankylosing spondylitis (AS), juvenile onset arthritis, reactive arthritis, non-radiographic ankylosing spondylitis, psoriasis arthritis, and inflammatory bowel disease associated arthritis.

Classification criteria ,that combine different type of information such as imaging, laboratory findings, symptoms, and signs, have been made to describe and define groups for better understanding of clinical and epidemiological studies.

Assessment of spondyloarthritis international society (ASAS criteria) have been widely used to classify the axial spondyloarthritis, which have been described as back pain more than or equal to 3 months and age of onset less than 45 years. ASAS suggest these two sort of criteria:

• Sacroiliitis on imaging plus 1 SpA feature. or
• HLA-B27 plus 2 other SpA features

Sacroiliitis on imaging will be describe as:

• Active inflammation on MRI highly suggested of SpA-assocoated sacroiliitis and/or
• Definite radiograohic sacroiliitis

SpA features:

• Inflammatory back pain
• Arthritis
• Enthesitis
• Anterior uveitis
• Dactylitis
• Psoriasis
• Crohn's disease or ulcerative colitis
• Good response to NSAID
• Family history of SpA
• HLA-B27
• Elevated CRP