Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Sacroiliitis x ray
Introduction
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Overview
Overview
X Ray
X Ray
- Normal SI joint is uniform in size throughout
- Only lower 2/3 of SI joint are true joint
- Earliest sign of sacroiliitis is widening of the joint
- Sclerosis and narrowing represent healing
- Unilateral Sacroiliitis
- TB
- Bilateral and symmetric
- Ankylosing spondylitis
- Narrowing and sclerosis
- Fusion eventually
- Almost always bilateral
- Inflammatory bowel disease
- Ulcerative colitis more often then Crohn’s
- Ankylosing spondylitis
- Enteropathic arthritis more common in Crohn’s-usually knee
- Inflammatory bowel disease usually does not affect the spine as often as ankylosing spondylitis
- Bilateral and asymmetric
- Rheumatoid arthritis, psoriasis and Reiter’s may affect one SI joint but usually affect both
- Usually asymmetric
- Gout is a rare cause of sacroiliitis
- May see erosions in spine
- SI Disease in Crohn’s
- SI Disease in Ulcerative Colitis
- About 1-22% of patients with UC
- Not correlated with activity of bowel disease
- Spondylitis usually precedes onset of bowel findings
- Appears identical to AS
- More common in males
- Peripheral joint involvement in 50-70%
- Especially shoulders and hips
- Higher incidence of elevated HLA B27 in patients with spondylitis or iritis
References
References
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]