Subtypes

Asymmetrical sacroiliac joint disease

Symmetrical sacroiliac joint disease

Unilateral sacroiliac joint disease

May Be Caused by

 Common

Ankylosing spondylitis

Infectious arthritis

Juvenile rheumatoid arthritis

Osteitis condensans ilii

Osteoarthritis

Osteomyelitis

Psoriatic arthritis

Reiter syndrome

Rheumatoid arthritis

 Uncommon

Behçet disease

Calcium pyrophosphate dihydrate crystal deposition disease

Chordoma

Enteropathic arthritis

Familial Mediterranean fever

Gaucher disease

Giant cell tumor

Gout

Hyperparathyroidism

Leukemia

Lymphoma

Metastasis to sacrum

Multicentric reticulohistiocytosis

Occupational acro-osteolysis

Paralysis

Paraplegia

Pseudohypoparathyroidism

Relapsing polychondritis

Sacral agenesis

Sacroiliitis circumscripta

Sarcoma

Sternocostoclavicular hyperostosis