Patients with
ankylosing spondylitis (AS) are at high
risk for
spinal fracture even after a
minor injury. Most
spinal fractures with
ankylosing spondylitis occur in the
cervical spine, whereas
spinal fractures in thoracic or lumbar
spine are rare. These fractures are often difficult to detect on standard radiographs, because the normal anatomical landmarks are lacking and the abnormal spinal stiffness precludes optimal exposure of the
spine. We
report on a case of a 12th thoracic
spine fracture in
ankylosing spondylitis with bamboo
spine after a
minor injury. In this case, anteroposterior and lateral radiographs of the thoracolumbar
spine showed a bamboo
spine typical for
ankylosing spondylitis with no evidence of fracture. However, computed
tomography showed a 12th thoracic fracture with burst. Therefore, this fracture, in a
patient with AS involved all three
spinal columns, was considered unstable.