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Review Question - QID 108544

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QID 108544 (Type "108544" in App Search)
A 68-year-old African American male presents to his primary care provider complaining of progressively worsening back pain. The pain is localized to the lower back and sometimes wakes him up from sleep. He has a history of hypertension and admits to a 50 pack-year smoking history. Further questioning reveals that he has also experienced fatigue and an unintentional weight loss of 18 pounds over the past year. Laboratory analysis is notable for an elevated alkaline phosphatase. A radiograph of the patient’s spine demonstrates multiple sclerotic lesions in the lumbar vertebral bodies. Which of the following tests would most likely confirm the diagnosis in this patient?