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Review Question - QID 6576

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QID 6576 (Type "6576" in App Search)
A 72-year-old man who underwent total shoulder arthroplasty 2 years ago slipped on ice and fell on his shoulder 3 weeks ago. Immediately after falling he was unable to elevate his arm. Motor examination reveals deltoid 5-/5, subscapularis 5-/5, external rotation 4-/5, and supraspinatus 2/5. Radiographs are shown in Figures 8a and 8b. What is the most likely diagnosis?
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  • B