Ankylosing spondylitis

Case contributed by Dr J Yeung


Male patient with back pain


There is fusion of 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
Published: 3rd Sep 2011
Last edited: 24th Dec 2019
Inclusion in quiz mode: Included

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