Question: A 17-year-old female patient presents to your office complaining of left knee pain for one month. She states that the pain is localized to the front of her knee, is intermittent, and occurs with using stairs, prolonged sitting with the knee bent, and running while playing soccer. She does not recall a traumatic incident. She lives in a duplex apartment with her family, with eight stairs into the building and the entrance to her apartment. She plays soccer, and the team practices four times a week for 2 hours, with games on the weekends.