Extracorporeal irradiation for malignant bone tumors

Area of Science:

• Orthopedic Oncology
• Surgical Oncology
• Radiation Oncology

Background:

• Extracorporeal irradiation (ECI) is a selective technique for managing primary malignant bone tumors.
• Since 1996, ECI has been employed, necessitating reporting of its techniques and outcomes.

Observation:

• Sixteen patients with primary malignant bone tumors (Ewing's sarcoma, osteosarcoma, chondrosarcoma) underwent ECI between 1996 and 2000.
• Tumor-bearing bone was resected after induction chemotherapy, irradiated extracorporeally (50 Gy), and reimplanted.
• Irradiation utilized either a linear accelerator or a blood product irradiator.

Findings:

• At a median follow-up of 19.5 months, no local recurrences or graft failures were observed.
• One patient required amputation due to chronic osteomyelitis.
• Functional outcomes were graded as good to excellent in 10 patients with over 18 months of follow-up.

Implications:

• ECI demonstrates encouraging short-term oncologic and orthopedic results for limb-sparing surgery in select patients.
• This technique is a viable alternative for reconstruction in primary malignant bone tumors.
• Long-term outcomes require careful assessment within a multidisciplinary setting.