Expandable Total Humeral Replacement in a Child with Osteosarcoma

Area of Science:

• Orthopedic Oncology
• Pediatric Surgery
• Biomedical Engineering

Background:

• High-grade osteosarcoma of the humerus in pediatric patients often necessitates limb amputation.
• Traditional limb salvage options for extensive humeral tumors in children have limitations.
• Expandable endoprostheses offer potential for growth adaptation but have shown high failure rates in early studies.

Purpose of the Study:

• To report the successful outcome of an expandable total humeral endoprosthesis in a pediatric patient with high-grade osteosarcoma.
• To evaluate the functional results and viability of this reconstructive technique in a young patient.

Main Methods:

• A total humerus resection was performed for a high-grade osteosarcoma in an 8-year-old female.
• Reconstruction involved an expandable total humeral endoprosthesis with a sleeve for soft-tissue ingrowth.
• The patient underwent one lengthening procedure during the follow-up period.

Main Results:

• At three-year follow-up, the patient exhibited excellent functional scores.
• The expandable total humeral endoprosthesis facilitated limb length preservation through a lengthening procedure.
• No major complications or device failures were reported within the follow-up period.

Conclusions:

• Total humeral resection and endoprosthetic reconstruction are rare but feasible in pediatric osteosarcoma.
• This case demonstrates that expandable total humeral endoprostheses can be a viable limb salvage option in children.
• Successful outcomes suggest potential for improved function and reduced amputation rates in pediatric limb oncology.