Figure 1 The patient was a 74-year-old woman with an L1 osteoporotic vertebral compression fracture and percutaneous vertebroplasty was performed. The yellow line through A and B indicates the kyphotic angle. (A, B) The kyphotic angle changed from 15.91° in preoperative standing lateral radiographs to 8.38° in intraoperative prone lateral radiographs. Thus, the dynamic fracture mobility was present. (C, D) Preoperative MRI showing the L1 osteoporotic vertebral compression fracture existed intravertebral cleft. (E) Preoperative CT showing the peripheral vertebrae wall damage. (F) Postoperative CT showing the occurrence of cement leakage.