Heterotopic ossifications after vertebroplasty using calcium phosphate in osteoporotic vertebral compression fractures: Report of 2 cases
Received 14 May 2009; accepted 17 July 2009. published online 15 October 2009.
Abstract
Background
Recently, calcium phosphate (CaP) cement, instead of polymethylmethacrylate, has been injected into the compressed vertebral body. Calcium phosphate may have the potential for ectopic or heterotopic ossification and, thus, injected CaP cement can induce unwanted heterotopic ossifications in the human body.
Case Description
The authors describe 2 cases of heterotopic ossifications after vertebroplasty using CaP in osteoporotic vertebral compression fractures. We performed percutaneous vertebroplasty using CaP cement in a 69-year-old woman with L2 compression fracture and an 80-year-old man with L1 compression fracture. Follow-up radiologic studies for both cases showed that heterotopic ossifications had developed around the CaP-augmented vertebral bodies and that the cemented vertebral bodies had recollapsed. Also, subsequent vertebral compression fractures had occurred.
Conclusions
We suggest that heterotopic ossification may be complications of vertebroplasty with CaP. Therefore, we strongly recommended that the patients who undergo a vertebroplasty with CaP need strict observation.
ABSTRACT