Review Question - QID 218155

A 52-year-old female presents to your office with complaints of generalized shoulder pain. She denies any specific trauma but has had pain for the last 2 months. She is having difficulty sleeping and has trouble performing her daily activities as a postal worker. On examination, she is afebrile and well-appearing without overlying swelling or erythema. Her active/passive range of motion is as follows: forward flexion = 100°, abduction = 110°, internal rotation = L5, and external rotation = 20°. Radiographs do not demonstrate any bony abnormalities or a high-riding humeral head. Based on her most likely diagnosis, you offer to give her a corticosteroid injection and send her to physical therapy. You also recommend obtaining a panel of basic blood work. Which of the following test results would most likely be elevated compared to normal ranges?