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. 5 As in this case, nearly 67% of chalk stick fractures from AS present with neurologic deficits. Curr Rheumatol Rep. 2011;13(5):409-415.
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