Treatment of Pediatric Bone Sarcomas.- Molecular Biology of Pediatric Bone Sarcomas.- Surgical Options for Limb Salvage in Immature Patients with Extremity Sarcoma.- Location of Sarcomas Within Bone: The Growth Plate.- A Histological Study of the Barrier Effect of the Physis Against Metaphyseal Osteosarcoma.- Growth Plate Involvement in Malignant Bone Tumours: Relationship Between Imaging Methods and Histological Findings.- Imaging-Based Indications for Resection with Epiphyseal Preservation.- Conservation of the Epiphysis While Removing Metaphyseal Bone Tumours: Epiphysiolysis Before Excision.- Clinical Results.- Other Techniques for Epiphyseal Preservation.- Questions and Answers.