Presentation
Patient underwent spinal surgery with initially reasonable clinical response. Two months later the symptoms recurred.
Patient Data
Postoperative films demonstrate an interspinous process decompression device (X-STOP) at the L4/5 level. Note the anterolisthesis of L4 on L5.
Films obtained two months later demonstrate that the device has rotated and shifted posteriorly, out from between the spinous processes.
Case Discussion
Interspinous process decompression devices, like the X-STOP in this case, are a minimally invasive approach to elderly patients with spondylosis. In this case, the device has rotated out from between the spinous processes.