| Eric A. Brandser, M.D.
Peer Review Status: Internally Peer Reviewed
 
AP and lateral views of the lumbosacral spine show classic
changes of ankylosing spondylitis. Note bilateral symmetric
sacroiliac erosive changes with sclerosis. Characteristically,
delicate vertical syndesmophytes bridge multiple vertebra
causing a "bamboo spine". On the lateral view, annular
calcification is noted causing the appearance of squared vertebral
bodies.
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