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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

From: Comparison of loss of correction between PSO and VCD technique in treating thoracolumbar kyphosis secondary to ankylosing spondylitis, a minimum 2 years follow-up

Fig. 2

A 37-year-old male patient with thoracolumbar kyphosis secondary to ankylosing spondylitis. a Preoperative standing lateral radiograph. b Immediately after surgery with pedicle subtraction osteotomy (PSO) technique. c Lateral radiograph taken 26 months after surgery. AIL angle of instrumented levels, DIDW the sum of distal non-fused intervertebral disc wedging, GK global kyphosis, KPNS kyphotic angle of proximal non-fused segment involved in the global kyphosis, LL lumbar lordosis, OA osteotomized vertebra angle, PJA proximal junctional angle, SVA sagittal vertical axis, HP hilus pulmonis, CG the center of gravity

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