Recurring osteoma within a calcium phosphate bone cement cranioplasty: case report.
OBJECTIVE
We present a unique case of a recurrent osteoma within a cranioplasty performed with calcium phosphate bone cement.


METHODS
The patient is a 7-year-old boy who had initially undergone a craniotomy for resection of a frontal cranial tumor followed by a cranioplasty with artificial bone matrix. On routine follow-up evaluation 2 years later, the patient had a mass expanding from the cranioplasty.


METHODS
At the time of reoperation, the patient was found to have a histopathologically confirmed recurrent osteoma within the artificial bone matrix. The patient later underwent repair of the frontal cranial defect using a patient-specific implant.


CONCLUSIONS
We discuss this unusual case, treatment, and possible causes. We believe that a safety margin and curettage of the resection border as well as resection of the overlying periosteum might prevent recurrence.
Department of Neurosurgery, Stanford University, Stanford, California, USA.
Melanie G
MG
Hayden
Raphael
R
Guzman
Mohanpal S
MS
Dulai
Bret C
BC
Mobley
Michael S B
MS
Edwards
D001843:Bone Cements / Q000627:therapeutic use; D001859:Bone Neoplasms / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D002130:Calcium Phosphates / Q000009:adverse effects* / Q000627:therapeutic use; D002648:Child; D006801:Humans; D008297:Male; D020366:Methylmethacrylate / Q000009:adverse effects*; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging / Q000601:surgery; D010016:Osteoma / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D011859:Radiography; D015898:Tomography Scanners, X-Ray Computed
D001843:Bone Cements; D002130:Calcium Phosphates; D020366:Methylmethacrylate; C020243:calcium phosphate