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Sacroiliac Joint (SI Joint)

X-ray of the lumbar spine and pelvis:
Yellow arrows point to posterior aspect
of the sacroiliac joints of the pelvis
The sacroiliac joint, or SI joint, is the joint in your pelvis that connects the sacrum and iliac bones to form your pelvis. This joint allows normal movement of the pelvis and stretches during labor. The SI joint usually does not move much and is not noticeable when normal.

Sacroiliac joint pain may be caused by an underlying condition that interrupts or prohibits joint movement. Hip, knee or ankle pain that causes gait changes (walking) may cause SI joint pain. Other problems causing or contributing to sacroiliac joint pain include systemic disorders such as arthritis and ankylosing spondylitis. Sacroiliac pain is often confused with hip pain, low back pain, or buttock pain. SI joint pain may be responsible for up to 15% of low back pain.

Treatment Options

Treatment may include nonsurgical therapies such as chiropractic manipulation, physical therapy, aquatic therapy, or sacroiliac joint injections. Sacroiliac joint injections involve placing a steroid (strong anti-inflammatory medication) guided by live x-ray guidance (fluoroscopy) into the joint to decrease inflammation.

To Learn More

If you have been diagnosed with SI joint dysfunction, sacroiliac joint sprain/strain, sacroiliitis, or are interested in learning how about treatment options to manage your pain, please contact our pain management experts at The Spine and Pain Institute of New York in Manhattan, New York and Staten Island, New York. We would be happy to make an appointment for a consultation and provide additional information about other treatment options.

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