Fig. 4.

Whole-spine lateral standing radiographs for a 70-year-old woman who underwent anterior interbody fusion using cage and posterior instrumentation with posterolateral fusion for recollapse of the T12 body with the intravertebral vacuum cleft sign and substantial back pain (scored 8 on a Visual Analog Scale). (A) Recollapse of the T12 body after vertebroplasty was identified. (B) After 6 months of conservative treatment, her thoracolumbar kyphosis, sagittal imbalance, and back pain had worsened. (C) Three months after anterior and posterior fusion, sagittal balance was achieved and her back pain was improved. PI, pelvic incidence; PT, pelvic tilt; SS, sacral slope; LL, lumbar lordosis; TK, thoracic kyphosis; TLK, thoracolumbar kyphosis; SVA, sagittal vertical axis.