Delayed Bone Cement Displacement Following Balloon Kyphoplasty

We report a rare case of delayed cement displacement after balloon kyphoplasty in patient with Kummell's desease. A 78-year-old woman with Kummell's desease at T12 level received percutaneous balloon kyphoplasty. Two months after surgery, the patient complained of progressive severe back pain. Computed tomographic scans revealed a breakdown of the anterior cortex and anterior displacement of bone cement. Although this complication is very rare, it is likely to occur in treatment of Kummell's desease accompanying anterior cortical defect.