A 58-year-old female who is generally healthy, presents to t…

A 58-year-old female who is generally healthy, presents to the primary care nurse practitioner with acute onset of pain in her right knee. She denies injury but reports walking daily for 3 mile per day. She states she increased the time and distance of her walks about 2 weeks ago. On exam, the primary care nurse practitioner observes swelling in the prepatellar area. No redness or warm are observed.  Which of the following in the primary differential diagnosis for this patient AND what is the most appropriate management for this problem?