The sacroiliac (SI) joint can be a primary source of low back pain. More often, it is a secondary site or part of a multifactorial syndrome from dysfunction elsewhere in the spine. SI joint injections provide diagnostic information and potential therapy in certain circumstances.
The exact prevalence of SI joint dysfunction is unknown because of difficulty in establishing a reference (criterion) standard. There is a high degree of mechanical interdependence in this region of the body and this concept is reflected in the term "lumbo-pelvic-hip complex." Etiologies other than biomechanical dysfunction affect the SI joint and include trauma (diastasis), inflammation (infectious or noninfectious arthropathies), or neoplasia. Tumor transgression may occur across the fibrous portion of the SI joint, but similar to other synovial joints the articular cartilage is a relative boundary to neoplastic invasion. Abnormalities of adjacent structures such as the sacrum (stress fractures) may alter SI joint biomechanics. Iatrogenic causes such as a large bone defect from a graft harvest site may also cause SI joint-mediated pain.
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Tired Having Back Pains All The Time, But You Choose To Ignore It? Every year millions of people see their lives and favorite activities limited by back pain. They forego activities they once loved because of it and in some cases may not even be able to perform their job as well as they once could due to back pain.