Review Question - QID 220032

A 12-year-old presents to the emergency room with her parents, who said that she dislocated her knee on the soccer pitch 6 hours earlier. They state this has never happened to her before and that she reduced it herself but has been reluctant to bend her knee since. She is referred to your office with the MRI shown in Figure A. Clinical exam demonstrates a large effusion, active range of motion of -10 to 90 degrees, and 3 quadrants of lateral patellar translation. Which of the following is the most appropriate next step in the management of her injury?