Pathologic fracture in osteosarcoma : prognostic importance and treatment implications

Area of Science:

• Orthopedic Oncology
• Surgical Oncology
• Cancer Research

Background:

• Pathologic fractures in osteosarcoma were historically associated with poor prognosis and amputation.
• The advent of neoadjuvant chemotherapy has potentially altered the prognostic significance of these fractures.

Purpose of the Study:

• To evaluate the prognostic importance of pathologic fractures in osteosarcoma in the era of neoadjuvant chemotherapy.
• To determine if limb salvage surgery is a safe and effective option for patients with osteosarcoma and pathologic fractures.

Main Methods:

• Retrospective analysis of 52 patients with osteosarcoma and pathologic fracture versus 55 matched patients without fracture.
• Data collected from eight institutions through the Musculoskeletal Tumor Society.
• Outcomes assessed included overall survival and local recurrence rates.

Main Results:

• Patients with a pathologic fracture had significantly lower 5-year survival rates (55% vs. 77%) and higher local recurrence rates (75% vs. 96%).
• In patients with fractures, limb salvage (n=30) and amputation (n=22) showed no significant difference in local recurrence (23% vs. 18%) or death rates (37% vs. 45%).
• Subgroup analysis of limb salvage cases indicated that factors like chemotherapy response and fracture union are crucial for successful outcomes.

Conclusions:

• Pathologic fractures in osteosarcoma increase the risk of local recurrence and decrease survival.
• Limb salvage surgery can be safely performed in carefully selected patients with pathologic fractures without compromising outcomes.
• Consideration of chemotherapy response and fracture healing is vital when deciding on limb salvage for these patients.