280 Increased Neoadjuvant Chemotherapy to Surgery Time Interval is Associated with Decreased Tumor Percent Necrosis in Osteosarcoma

281 Decreased Tumor Percent Necrosis is Associated with Positive Final Margin Status in Osteosarcoma

282 Orthopaedic Oncology Administrative Coding Data Submitted to the U.S. News & World Report: Accuracy and Implications

e359 Intraoperative Frozen Bone Marrow Margins During Long Bone Ewing Sarcoma Resection – More Trouble Than They’re Worth?