Chalk Stick Fracture in Ankylosing Spondylitis
Global Radiology CME
APRIL 2, 2023
2 Ossification of vertebral ligaments present as the dagger sign on X-ray, while ossification of the outer fibers of the annulus fibrosus presents as a bamboo spine. 7 Primary diagnosis of AS involves radiography of sacroiliac joints and symptomatic areas of the spine (Figs.
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