Ankylosing spondylitis with dagger sign
Known case of ankylosing spondylitis
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Typical appearance of bamboo spine with multiple syndesmophytes between the vertebral bodies. Degenerative changes as endplate sclerosis and mild irregularity are seen. Normal lordosis of the lumbar spine is reversed.
There is a single central radiodense line related to ossification of supraspinous and interspinous ligaments which is called dagger sign.
- 1. Donald Resnick, Mark J. Kransdorf. Bone and Joint Imaging. (2020) ISBN: 9780721602707