Fig. 4

a, b, c, d. A 41 years old male patient, presenting with severe back and radicular pain, without cord compression symptom. Anterior column collapse in lower thoracic region. The kyphotic angle of T9-11 was 80.6° and SVA was measured 1.0 cm preoperatively. e, f. The transpedicular bi-vertebrae wedge osteotomy was performed in T9 and T10. A postoperative kyphotic angle of 23.1°and better sagittal alignment were achieved. Notably, an extra cage was placed in lower intervertebral space to keep height of it