Arthritis of the Sacroiliac Joint: Imaging-Based Diagnosis, Pathophysiology, and Evidence-Based Management
Arthritis of the Sacroiliac Joint is an increasingly recognized yet frequently underdiagnosed cause of chronic low back pain. In recent years, high-quality epidemiological and imaging-based studies have demonstrated that up to 25% of chronic low back pain cases originate from the sacroiliac joint (SI joint) , making sacroiliac joint arthritis a critical diagnostic consideration for clinicians, radiologists, and medical trainees alike. This article provides a comprehensive, expert-level review of sacroiliac joint arthritis , integrating pathophysiology, epidemiology, clinical presentation, imaging features, differential diagnosis, diagnosis, treatment, and prognosis , based on the most influential contemporary literature . All figures from the attached case file are fully incorporated with detailed imaging interpretation. Anatomy and Biomechanics of the Sacroiliac Joint The sacroiliac joint (SI joint) is a paired diarthrodial synovial joint connecting the sacrum to the iliac bones of ...