Table 1.

Study group inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
• Age > 18 years old	• Lost of follow-up
• Confirmed osteosarcoma in biopsy	• Surgery outside our department
• Extremity location	• Non-extremity location
• Limb-sparing surgery with the use of megaprothesis in our department	• Mutilating surgery
• Complete follow-up