Review Question - QID 7903

A 72-year-old man who underwent an uncomplicated total shoulder arthroplasty 4 weeks ago now reports injuring his shoulder in a fall on the ice. He attempted to catch himself on a railing with his operative arm. He continues to feel pain anteriorly in the shoulder. His range of motion is 140 degrees forward elevation, 90 degrees external rotation with the arm at the side, and internal rotation up the back to L1. Radiographs are normal. What is the most likely diagnosis?