Fig. 1

A 39-year-old male patient suffering from Andersson lesion-complicating ankylosing spondylitis. a–d Clinical appearance before surgery, and the final follow-up of 2 years. e, f Preoperative radiograph showed a remarkable kyphosis in thoracolumbar spine with a regional kyphosis of 72. g, h CT sagittal reconstruction image demonstrated fractures with irregular discovertebral osteolysis. i, j The X-ray at 2 years postoperatively showed the regional kyphosis was corrected to 17. k, l Three-dimensional reconstruction demonstrated that solid fusion of resection site was achieved