MUSCULOSKELETAL PROBLEMS Question 1. A 13-year-old obese (body mass index [BMI] above the 95th percentile) boy reports low-grade left knee pain for the past 2 months. He denies antecedent trauma but admits to frequent “horseplay” with his friends. The pain has progressively worsened, and he is now unable to bear weight at all on his left leg. His current complaints include left groin, thigh, and medial knee pain and tenderness. His examination demonstrates negative drawer, Lachman, and Mc...