A 17-year-old woman presents to the emergency department with a burning pain and swelling of her right shoulder. The patient states that the pain started a month ago, is sporadic, and is related to strain, but is not frequently felt at night. She rates her pain at a 7 on a 1-10 severity of pain scale, with 10 being the highest. She is otherwise healthy and plays on her high school basketball team. She has not had any trauma to her shoulder. The patient states that she has no systemic symptoms, including no recent weight loss or decreased movement. The patient has no personal or family history of cancer or illnesses. Social history is otherwise non-contributory. She is not on any medications.