Acromioclavicular Joint Separation

A 30-year-old man presented after a recent fall that had resulted from a loss of balance while he was walking. On examination, his vital signs were normal, but a palpable posterior fullness with swelling was seen over his left shoulder. A 30-year-old man visited the emergency department after a fall that had resulted from a loss of balance while he was walking that day. The patient recalled that he had sustained the impact of the fall on his left shoulder. On examination, his vital signs were normal, but a palpable posterior fullness with swelling was seen over his left shoulder (Panels A and B). Active abduction of the shoulder was limited and painful. Findings from a neurovascular examination of the ipsilateral arm and hand were normal. No tenderness over the sternoclavicular joint was noted. A left anteroposterior radiograph of the . . .