A 45-year-old woman presents for a sick visit with a chief complaint of 2–3-day sudden onset right elbow swelling with pain, stating, “I’ve never had pain like this. It looks like I have a swollen ball hanging from my elbow”. She denies recent or remote injury to the area, fever, pain in other joints or skin lesions, and does report recently spending an extensive period of time on her computer due to a major work project. Physical exam reveals an area of painful sac-like swelling behind...