P221 Long-Term Outcomes of Surgical Treatment for Primary Synovial Chondromatosis of the Hip

P222 Long-term outcomes of local control procedures in peri-articular bone sarcomas of the knee – a report from the Childhood Cancer Survivor Study

P223 Extended Curettage Combined With Liquid Nitrogen and Bone Cement Is An Effective Approach In Managing Recurrent Giant Cell Tumour Around The Knee Joint: A Retrospective Study.

P224 Impact of mRNA Vaccines on Anti-PDL1 Immunotherapy Outcomes in Patients with Metastatic Bone Disease

P225 Isolated Limb Perfusion Can Deter Amputation Indication in Initially Non-Salvageable Sarcomas