Abstract

A case report and review of the literature. To report a rare case of a vertebral compression fracture in the middle of fused segments in the absence of a history of trauma, and to investigate the contributory factors. Few articles have been published on vertebral fractures among fused segments. However, several articles have addressed fractures at juxtafused segments after implant removal. To the best of the authors' knowledge, only one case of compression fracture within fused segments has been previously reported. This study involved the case of a 62-year-old woman with vertebral compression fracture of L4 within a solid fused segment region after implant removal. An investigation was conducted to identify the factors that contributed to this compression fracture. Plain radiographs and bone scanning showed a compression fracture of L4 within a region of fused segments (L3-S1) after implant removal without the history of injury. BMD revealed osteopenia of -2.3 SD on the neck of the femur. The patient's symptoms were relieved by conservative treatment. The contributory factors may have been persistent anterior motion, osteopenia and/or osteoporosis, and a subcortical substance defect associated with screw tracks after implant removal. Vertebral compression fractures in solid fused segments may occur as a complication of implant removal. Accordingly, if spinal implant removal is needed for revision surgery, surgeons should be aware of this significant complication.

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