Ankylosing spondylitis

Case contributed by Dr J Yeung

Presentation

Male patient with back pain

X-ray

There is fusion fo bilateral sacroiliac joints, syndesmophytes and squaring of vertebral bodies.

Case Discussion

Sacroiliitis may present as sclerosis of joint margins which could be asymmetrical at early stage of disease, but is bilateral and symmetrical in late disease. Squaring of anterior vertebral margins is due to osteitis of anterior corners. Syndesmophytes are due to ossification of outer fibers of annulus fibrosus.

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Case information

rID: 14899
Case created: 3rd Sep 2011
Last edited: 18th Dec 2015
Inclusion in quiz mode: Included

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