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The seronegative spondyloarthropathies
J M Kettering1, J D Towers, D A Rubin
1Department of Radiology, University of Pittsburgh Medical Center, PA 15213, USA.
Seminars in Roentgenology
|July 1, 1996
Summary
Seronegative spondyloarthropathies are classified by sacroiliitis and spondylitis patterns. Differentiating these conditions from rheumatoid arthritis involves analyzing joint involvement and characteristic bone changes.
Area of Science:
- Rheumatology
- Immunology
Background:
- Seronegative spondyloarthropathies encompass four distinct conditions.
- These conditions share overlapping features, necessitating clear diagnostic criteria.
Purpose of the Study:
- To categorize seronegative spondyloarthropathies based on sacroiliitis and spondylitis patterns.
- To elucidate the distinct clinical and radiographic features differentiating these conditions from rheumatoid arthritis.
Main Methods:
- Analysis of sacroiliitis and spondylitis patterns.
- Evaluation of axial and appendicular skeletal involvement.
- Comparison of radiographic features including erosions, enthesitis, and periostitis.
Main Results:
- Two main groups identified based on axial skeletal involvement: ankylosing spondylitis/enteropathic arthropathy and psoriatic arthritis/Reiter's syndrome.
- Peripheral joint involvement patterns differ, with distal appendicular disease characteristic of psoriatic arthritis and Reiter's syndrome.
- Radiographic findings like proliferative erosions, enthesitis, periostitis, and normal mineralization aid in distinguishing psoriatic arthritis and Reiter's syndrome from rheumatoid arthritis.
Conclusions:
- Classification of seronegative spondyloarthropathies is aided by distinct patterns of axial and peripheral joint involvement.
- Specific radiographic features are crucial for differentiating psoriatic arthritis and Reiter's syndrome from rheumatoid arthritis.