The American journal of orthopedics
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The sacroiliac joint itself and the specific diagnosis of sacroiliac dysfunction are both underappreciated causes of pain in the low back, the pelvis, and the proximal lower extremities. An anatomically atypical synovial joint, its extensive innervation accounts for multiple modes of pain presentation. The joint and its associated ligament complex are subjected to rather constant and significant stresses. ⋯ Nonoperative treatment is usually physical therapy, and both diagnostic and therapeutic injection of the sacroiliac joint may be employed. Surgery is a treatment of last resort. There is a lack of long-term studies that address the natural history of this problem and its treatment.