Hey, I am young! And Alan, wow, it appears your surgeon was still actively authoring papers and perhaps consulting, as recently as 2008!

Kevin, if you are actually pondering this, you might find these articles from PubMed of interest:

C7 decancellisation closing wedge osteotomy for the correction of fixed cervico-thoracic kyphosis.

Flexion osteotomy of the cervical spine: a new technique for correction of iatrogenic extension deformity in ankylosing spondylitis.

Early complications of spinal pedicle screw.

Surgical management of symptomatic cervical or cervicothoracic kyphosis due to ankylosing spondylitis.

Clinical outcome results of pedicle subtraction osteotomy in ankylosing spondylitis with kyphotic deformity.

If I was ever confronted with the necessity due to troubles of seeing, swallowing or breathing, I would want to consult with either Alan's surgeon (with his vast expertise and yrs of experience, specific to AS), or a surgeon who had developed their skills by training under him.

I bet it is difficult to even contemplate.