Review Question - QID 212431

A 16-year-old man is brought to the emergency department for left arm pain. Per the patient, he was playing at his high-school football game when a member of the opposing team tackled him from behind, which resulted in him landing on his left arm. He felt a “popping” sensation and immediate, sharp pain at his left shoulder. The patient is in mild distress and holds his arm against his abdomen. Physical examination demonstrates limited abduction secondary to pain and reduced muscle tone over the shoulder. What additional finding would you expect from this patient?