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Case of the Week 250 
What's the most likely diagnosis?
- 36 year-old mother of four with back pain
- Lead poisoning
- Ankylosing spondylitis
- Osteoblastic bone metastases
- Osteitis condensans ilii
- Reiter's syndrome
Answer:
4. Osteitis condensans ilii
More (Click Discussion Tab)
Osteitis condensans ilii
General considerations
- Benign sclerosis of the iliac side of the sacroiliac joints
- Bilaterally symmetric
- Rarely unilateral
- Radiologic diagnosis discovered serendipitously
- Usually found in young females who have had several children but also may be seen in males
- Related to remodeling of bone following stress across the sacroiliac joint
- Other theories of etiology are that it is related to a urinary tract infection, or that it
- May be related to a form of inflammatory arthritis
- Clinical findings
- Rarely symptomatic but may be mildly painful
- May have morning stiffness and polyarthralgia
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