A 46-year-old female reports pain in both of her ankles, but she is more concerned about her right ankle. She was playing soccer over the weekend and heard a "pop." She is able to bear weight, but it is uncomfortable. In determining the cause of the ankle pain, based on your knowledge of anatomy, what foot structures are likely involved? What other symptoms need to be explored? What are your differential diagnoses for ankle pain? What physical examination will you perform? What special maneuvers will you perform? Should you apply the Ottowa ankle rules to determine if you need additional testing?