Review Question - QID 218656

A 2-year-old male presents to the ED with fevers, irritability, and refusal to bear weight on the left leg for the past 24 hours. The patient’s mother states that he had a trip and fall while playing outside two days ago but only sustained minor abrasions. The patient is holding the left hip in a slightly flexed and externally rotated position and cries with any attempt to move the hip. Laboratory studies are ordered and pending. Figure A is a radiograph of the patient’s pelvis. Which of the following laboratory values would support the patient's diagnosis?