Case Study: Upper Arm Pain in a Warehouse Worker

 A 21-year-old man presents with 4 to 5 months of right upper arm pain. He works in a warehouse and lifting objects has become increasingly painful. The pain became severe at work, which prompted him to visit an urgent care center. Anteroposterior and lateral radiographs of the right humerus show a well-circumscribed cystic lesion in the proximal ...