PLE-4694

A 12-year-old female came in for knee pain and swelling. Has she been receiving physical therapy for 3 months?Patient cannot participate in physical education classes due to limited range of motion. One month PTA, patient now noted ankle and wrist pain and swelling associated with fever, generalized lymphadenopathy, and migratory salmon colored rash. Upon physical examination, pericardial friction rub was heard. ANA was negative while CBC showed anemia. Which of the following is the most likely diagnosis?