SI Joint Pain: Why It Is Often Misdiagnosed
Summary
Sacroiliac joint dysfunction is frequently misdiagnosed because its symptoms mimic sciatica, piriformis syndrome, and hip pain. The joint connects the sacrum to the pelvis, relying on tight ligaments for stability. When ligament laxity allows abnormal joint movement during sitting or standing, pain spreads into the low back, buttock, or leg. Standard lying-flat magnetic resonance imaging scans miss this dynamic instability because the joint shifts under load. A complete evaluation requires examining movement patterns across the lumbopelvic system and using targeted diagnostic injections to determine if joint instability or secondary muscle guarding drives the symptoms.
Conditions and treatments discussed
- Sacroiliac Joint Dysfunction. Ligament laxity allows the joint to shift under load, producing referred pain across the low back, hip, buttock, and leg.
- Lying-Flat MRI Scans. Standard static imaging often fails to capture sacroiliac joint instability because symptoms occur primarily during dynamic movements like sitting, standing, and walking.
- Targeted Diagnostic Injections. Injections help clarify whether the sacroiliac joint itself is generating the pain or if surrounding structures are involved.
- Regenerative Treatments and Physical Therapy. Options like prolotherapy or platelet-rich plasma target ligament laxity, while physical therapy addresses compensatory movement patterns and muscle guarding.
What this shows about Manhattan Pain Medicine
In this article, Dr. Siefferman illustrates Manhattan Pain Medicine's focus on comprehensive diagnostic evaluation over single-structure explanations. The practice reports evaluating sacroiliac joint pain within the larger lumbopelvic system, looking beyond static imaging to assess how hip instability, nerve irritation, and muscle guarding interact. Manhattan Pain Medicine describes using targeted diagnostic injections as investigative steps to confirm whether joint laxity drives the symptoms. This structured diagnostic reconsideration helps distinguish the primary mechanical cause from secondary protective tension.