[The juvenile bone cyst: treatment with continuous decompression using cannulated screws]

Area of Science:

• Orthopedic Surgery
• Skeletal Pathology

Background:

• Unicameral bone cysts (UBCs) may arise from intraosseous venous obstruction and interstitial fluid accumulation.
• Continuous fluid decompression via cannulated screws offers a potential causal therapeutic strategy.

Purpose of the Study:

• To evaluate the efficacy of curettage and mechanical decompression using cannulated screws for treating UBCs.
• To assess clinical and radiographic outcomes of this treatment approach.

Main Methods:

• Retrospective analysis of 17 patients with UBCs treated with curettage and cannulated screws.
• Clinical and radiographic follow-up to assess healing, defects, and recurrence.

Main Results:

• Complete healing occurred in 2 patients; 6 had persistent defects after healing.
• 6 lesions remained persistent, and 3 recurred after temporary remodeling.
• Proximal femur UBCs had a 75% persistence rate, and proximal humerus UBCs had a 50% persistence rate.

Conclusions:

• Cannulated screws are applicable for proximal humerus UBCs with recurrent fractures but have common failures.
• Healing with residual defects should be considered a good outcome; cosmetic surgery is not advised.
• Treatment of proximal femur UBCs with cannulated screws is not recommended due to poor results; immediate surgical stabilization is preferred.