Review Question - QID 109693

A 22-year-old man presents to the emergency department after being tackled in a game of football. The patient was hit from behind and fell to the ground. After the event, he complained of pain in his knee. The patient has a medical history of anabolic steroid use. His current medications include whey protein supplements, multivitamins, and fish oil. His temperature is 99.5°F (37.5°C), blood pressure is 137/68 mmHg, pulse is 100/min, respirations are 17/min, and oxygen saturation is 98% on room air. On physical exam, you see a muscular young man clutching his knee in pain. The knee is inflamed and erythematous. When valgus stress is applied to the leg, there is some laxity when compared to the contralateral leg. The leg is stable to pivoting movements. Which of the following physical exam findings is most likely to be seen in this patient?