Bilateral symmetrical Sacroilitis is hallmark of :
Diagnostic radiological features of Ankylosing spondylitis are: Bilateral symmetrical Sacroilitis (earliest and most specific feature) Bamboo-spine (knobby spine, poker back or universal syndesmophytosis) is a characteristic feature of it. Syndesmophytes - ossifications of the outer fibers of annulus fibrosis. Enthesitis (earliest pathological change) Uncommon involvement of small joints of hand and feet.
Ankylosing spondylitis
Juvenile Rheumatoid ahritis
Nail Patella syndrome
Osteitis condensans ilii
Musculoskeletal Radiology