Review Question - QID 218690

A 7-year-old female was playing softball with her father when she noted immediate pain in her left arm while batting. She was unable to keep playing and was brought into urgent care, with radiographs demonstrating the findings in Figure A. The patient was referred to an Orthopeadic oncologist, who diagnosed the patient with the pathology associated with the histologic findings shown in Figure B. Which of the following is the most appropriate next step in management?