Review Question - QID 211076

A 28-year-old woman presents to the emergency department with lateral knee pain that started this morning. The patient is a college student who is currently on the basketball team. Her pain started after she twisted her knee. Her current medications include albuterol and ibuprofen. Her temperature is 99.4°F (37.4°C), blood pressure is 117/63 mmHg, pulse is 67/min, respirations are 12/min, and oxygen saturation is 99% on room air. Physical exam is notable for tenderness to palpation over the lateral right knee. When the patient lays on her left side and her right hip is extended and abducted it does not lower to the table in a smooth fashion and adduction causes discomfort. The rest of her exam is within normal limits. Which of the following is the most likely diagnosis?