Sacroiliac Joint Dysfunction
Sacroiliac (SI) joint dysfunction refers to pain originating from the sacroiliac joint complex, a common but often underdiagnosed cause of low back and buttock pain. The SI joint transmits forces between the spine and lower extremities and can become painful through inflammatory, degenerative, or traumatic mechanisms.
Symptoms
- Low back pain localized to the posterior superior iliac spine (PSIS)
- Pain in the buttock, lateral hip, or groin
- Pain with transitional movements (sit-to-stand, rolling in bed)
- Can mimic sciatica but pain rarely extends below the knee
- Stiffness in the morning
- Pain with prolonged standing
Causes
- Hypermobility or hypomobility
- Degenerative arthropathy
- Post-surgical (post-laminectomy)
- Post-partum instability
- Trauma (fall on buttocks)
- Leg length discrepancy
Diagnosis
Accurate diagnosis is essential for effective treatment. Clinicians typically use a combination of:
- Clinical provocation tests (cluster of ≥3/5 positive tests): Gaenslen's, FABER, compression, distraction, thigh thrust
- Diagnostic SI joint injection (gold standard)
- X-ray, MRI for structural pathology
- Bone scan for sacroiliitis
Treatment Approaches
Related Procedures
🚨 Red Flags
Seek urgent medical evaluation if you experience any of the following:
- ⚠️ Fever, night sweats, weight loss (infection/malignancy)
- ⚠️ History of IV drug use (septic SI joint)
- ⚠️ Bilateral sacroiliitis (inflammatory spondyloarthropathy)
Frequently Asked Questions
Related Conditions
Sciatica
Sciatica refers to pain that radiates along the path of the sciatic nerve, from the lower back through the hips and buttocks and down the leg. It typically affects one side of the body and is caused by compression of the sciatic nerve roots (L4-S3), most commonly from a lumbar disc herniation or foraminal stenosis.
Facet Joint Syndrome
Facet joint syndrome (zygapophyseal joint syndrome) is pain arising from the facet joints of the spine due to degenerative changes, injury, or inflammation. It is a common cause of chronic spinal pain and is diagnosed clinically and confirmed with diagnostic medial branch blocks.
You May Also Want to Understand
Sciatica
Sciatica refers to pain that radiates along the path of the sciatic nerve, from the lower back through the hips and buttocks and down the leg. It typically affects one side of the body and is caused by compression of the sciatic nerve roots (L4-S3), most commonly from a lumbar disc herniation or foraminal stenosis.
Lumbar Spinal Stenosis
Lumbar spinal stenosis (LSS) is a narrowing of the spinal canal, lateral recesses, or neural foramina in the lumbar spine that results in compression of neural structures. It is the most common reason for spinal surgery in adults over 65 and is typically caused by degenerative changes including disc bulging, facet joint hypertrophy, and ligamentum flavum thickening.
Cervical Radiculopathy
Cervical radiculopathy is pain, numbness, or weakness caused by compression or irritation of a cervical nerve root. It most commonly results from disc herniation or foraminal stenosis and typically affects the C6 or C7 nerve roots.
Facet Joint Syndrome
Facet joint syndrome (zygapophyseal joint syndrome) is pain arising from the facet joints of the spine due to degenerative changes, injury, or inflammation. It is a common cause of chronic spinal pain and is diagnosed clinically and confirmed with diagnostic medial branch blocks.
Dr. Shahnawaz F Shah
Interventional Spine & Pain Physician
Dr. Shah specializes in the diagnosis and management of sacroiliac joint dysfunction using evidence-based approaches tailored to each patient's needs.
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