Purpose of reviewCervical spine surgery is often indicated in patients with ankylosing spondylitis, most often for stabilization of fractures or correction of deformity. Operating on patients with ankylosing spondylitis requires a number of unique considerations. The purpose of this review is to provide the reader with an update of recent literature and findings concerning this topic.
Recent findingsCervical fractures in patients with ankylosing spondylitis are usually inherently unstable and are associated with a higher rate of neurologic injury and complications than in patients with nonankylosing spondylitis. Early diagnosis is the key to preventing neurologic decline. Surgical fixation has advantages of earlier mobilization and protection and the neural elements. Preoperative kyphotic deformity, proclivity for epidural hematomas, and osteoporosis/osteopenia must be considered when planning surgery, however. Cervical osteotomy can lead to good results in patients with ankylosing spondylitis with chin-on-chest deformities, but it also presents a number of surgical challenges. As with fracture surgery, prone positioning can be difficult because of cervicothoracic and lumbar kyphosis. Awake surgery in the seated positioning can be useful, although it presents a risk for intravascular air embolus. Neurologic decline is most likely during osteotomy closure. It is best prevented by performing a controlled reduction maneuver and avoiding overcorrection with continuous spinal cord monitoring. Summary Great care and thoughtful planning are critical to optimizing results and avoiding complications when performing cervical spine surgery in patients with ankylosing spondylitis.