Magnetic resonance imaging in cervical trauma associated with ankylosing spondylitis: report of two cases.

Findings on magnetic resonance imaging (MRI) in two cases of traumatic cervical fracture associated with ankylosing spondylitis are presented. In such patients cervical fracture usually occurs in the lower cervical spine from hyperextension injuries. Classic radiologic investigations including plain films, myelography, and computed tomography are insufficient because of osteopenia and distorted anatomy: MRI is superior to other techniques.