One‐level mini‐open pedicle subtraction osteotomy for treating spinal kyphosis in patients with ankylosing spondylitis

To report a mini-open pedicle subtraction osteotomy (PSO) technique, to summarize the 2-year follow-up results of 25 patients, and to describe a modified operating table which allows the osteotomy to be closed in a more controllable manner.