(IM.201)
A 36-year-old male comes to your office with intermittent right knee pain of 3 weeks duration. He remembers a popping sensation while changing direction during a football game 3 weeks ago that produced moderate swelling in the joint. Past medical history is unremarkable. On exam, a click is palpated when the examiner places a hand on the medial knee while externally rotating the knee during extension from the flexed position. The patient is unable to fully straighten the right knee. Radiographs of the knee are normal. Which of the following is the most likely diagnosis?
QID:
206245