Sacroiliac Joint Pain Differential Diagnoses

Sacroiliac ligament pain (interosseous or dorsal ligaments)
Mechanical
- Locking
- Hypermobility
Osteoarthritis
Following Lumbosacral fusion
Fracture
Tumour
Rheumatological disorders
- Axial spondyloarthritis
- Psoriatic arthritis
Infection
Myofascial pain (Quadratus Lumborum, Gluteus Maximus, Piriformis, Levator Ani)
Secondary causes: Discogenic pain, Facet joint pain, Hip disease, Spinal stenosis, Flail coccyx (coccydynia), S1 foraminal stenosis

Axial Skeleton	Neck Pain Thoracic Pain Low Back Pain Sacroiliac Pain Coccydynia
Upper Limbs	Sternoclavicular Joint Pain Shoulder Pain and Instability Elbow Pain Wrist Pain and Instability Neuropathic Arm Pain
Lower Limbs	Hip Pain Lateral Hip Pain Groin Pain Posterior Thigh Pain Buttock Pain Anterior Thigh Pain Knee Pain Calf Pain Ankle Pain Foot Pain Neuropathic Leg Pain
Other	Abdominal Wall Pain Chest Wall Pain Joint Hypermobility Vertigo Widespread Pain Anterior Throat Pain Arthritis Rheumatology Symptoms