Fig. 1.

A 61-year-old male with L4–L5 TB underwent one-stage posterior debridement, titanium mesh cage bone grafting and single-segment fixation. a–c Preoperative images showing that the lesion was located at L4–L5 with a lordosis angle of 26°. d, e Postoperative X-ray demonstrating correction of the deformity (lordosis angle was 40°). f CT images showing satisfactory bone fusion at 9 months. g, h X-ray images displaying good internal fixation position and solid bone fusion, with no loss of lordosis angle and no change in adjacent segment DH throughout 66 months of follow-up