Sacroiliac Joint Syndrome – Causes & Treatment
Sacroiliac joint syndrome refers to pain originating from the sacroiliac joint, which connects the spine to the pelvis. It is a common cause of lower back and buttock pain.
Things worth knowing about "Sacroiliac joint syndrome"
Sacroiliac joint syndrome refers to pain originating from the sacroiliac joint, which connects the spine to the pelvis. It is a common cause of lower back and buttock pain.
What is Sacroiliac Joint Syndrome?
Sacroiliac joint syndrome (also known as SI joint syndrome or SI joint dysfunction) is a condition affecting the sacroiliac joint – the joint that connects the ilium (hip bone) to the sacrum at the base of the spine. This joint plays a key role in transferring forces between the upper body and the legs. When the joint becomes dysfunctional, it can cause significant pain and restricted movement.
Causes
Sacroiliac joint syndrome can result from a variety of causes:
- Overuse or abnormal loading of the joint, such as from repetitive physical activity or heavy lifting
- Trauma, including falls on the buttocks or motor vehicle accidents
- Pregnancy: hormonal changes cause ligament laxity, which can destabilize the joint
- Leg length discrepancy or spinal misalignment
- Inflammatory conditions such as ankylosing spondylitis
- Degenerative changes (osteoarthritis) of the SI joint
- Muscular imbalances in the surrounding musculature
Symptoms
Common symptoms of sacroiliac joint syndrome include:
- Pain in the lower back, typically on one side
- Pain radiating to the buttocks, groin, or leg
- Increased pain when standing up, climbing stairs, or sitting for prolonged periods
- Morning stiffness in the pelvic region
- Worsening pain during single-leg activities (e.g., walking or standing on one leg)
- Occasional numbness or tingling in the leg (if nerves are irritated)
Diagnosis
Diagnosing sacroiliac joint syndrome typically involves:
- Medical history and physical examination: specific provocation tests such as the FABER test or compression test
- Imaging: X-ray, MRI (Magnetic Resonance Imaging), or CT scan to rule out structural damage or inflammation
- Diagnostic nerve block: injection of a local anesthetic into the SI joint to confirm the source of pain
Because the symptoms of SI joint syndrome overlap with other spinal conditions, careful differential diagnosis is essential.
Treatment
Conservative Treatment
Most cases of sacroiliac joint syndrome respond well to conservative measures:
- Physical therapy: targeted exercises to strengthen core and pelvic floor muscles
- Manual therapy or osteopathy: mobilization and manipulation of the SI joint
- Heat therapy or cold therapy to relieve acute pain
- Pain medication: non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or diclofenac
- Orthopedic support: pelvic belts to stabilize the joint
Minimally Invasive and Surgical Treatment
For persistent or treatment-resistant cases, additional options may be considered:
- Corticosteroid injections into the SI joint to reduce inflammation
- Radiofrequency ablation: targeted nerve denervation to interrupt pain signals
- SI joint fusion (arthrodesis): surgical stabilization in severe, chronic cases
Prognosis
The prognosis for sacroiliac joint syndrome is generally favorable. With consistent physical therapy and lifestyle adjustments, most patients experience significant improvement. Chronic cases may occur, particularly if underlying causes remain untreated.
References
- Maugars Y. et al. – Assessment of the efficacy of sacroiliac corticosteroid injections in spondylarthropathies. British Journal of Rheumatology, 1996.
- Szadek K.M. et al. – Diagnostic validity of criteria for sacroiliac joint pain. Journal of Pain, 2009.
- Cohen S.P. – Sacroiliac joint pain: a comprehensive review of anatomy, diagnosis, and treatment. Anesthesia & Analgesia, 2005.
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