Review Question - QID 212867

A 72-year-old woman presents to the emergency department for 3 days of severe right knee pain. She states that the pain is worse in the morning and prevents her from moving the joint or walking. Her past medical history is significant for osteoporosis for which she is taking bisphosphonates. On physical exam, her right knee is found to be warm, enlarged, erythematous, and tender to palpation. Joint aspiration demonstrates a leukocyte count of 2900/mm^3 with 52% polymorphonuclear cells. Microscopy of the aspirated fluid is performed and results are shown in Figure A. Which of the following would most likely be seen on radiography?