Purpose
The purpose of this study was to evaluate the outcome of flexible intramedullary nailing for unicameral bone cysts in terms
of function and osseous consolidation.
Methods
Twenty-two unicameral bone cysts in children’s long bones were treated by flexible intramedullary nailing. In 13 cases the
bone cyst was diagnosed in a traumatic event leading to a pathologic fracture. Fifteen patients were referred to our clinic
after failed conservative treatment. In 16 patients the cyst was located in the humerus, and in 6 patients in the femur. Mean
duration of follow-up after surgery was 24 months.
Results
According to Capanna’s criteria healing was obtained in 20 cases with a mean time of 16 months. Sixteen cysts healed completely.
Four lesions were classified as grade 2, meaning that residual radiolucencies were radiographically visible at the latest
follow-up. Two recurrences of humeral cysts were seen at 16 and 18 months postoperatively. The complication rate was minimal.
Conclusion
Due to the immediate stabilization of the lesion aftercare becomes facile. This method allows prompt mobilization and early
weight bearing without the necessity of a plaster cast. Further it prevents effectively the most common complication, a re-fracture
or a pathologic fracture. Therefore we propose this surgical procedure as the treatment of choice for unicameral bone cysts
in children’s long bones.
Keywords Unicameral bone cyst - Children - Long bones - Flexible intramedullary nailing - Decompression
No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the
subject of this article. No funds were received in support of this study.
M. C. Glanzmann is AO Intl. Fellow