To assess survival outcome of pediatric patients with localized osteosarcoma of the extremities in Upper Egypt, identify factors of prognostic significance for survival, and to determine factors predictive of surgical methods employed in these patients, and developing a clinical model for risk prediction.
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Overall survival (OS)
Timeframe: From date of treatment initiation until the date of death from any cause or patients censored at last follow up, whichever came first, assessed up to 60 months
Metastasis-Free survival (MFS)
Timeframe: From date of treatment initiation until the date of first documented systemic recurrence or patients censored at last follow up, whichever came first, assessed up to 60 months