Review Question - QID 212813

A 17-year-old teenage boy is brought to the emergency room for severe right upper quadrant (RUQ) pain for the past 5 hours. He denies any precipitating events and reports a sharp, 8/10, constant pain at the RUQ. He denies any past episodes. His past medical history is unremarkable, and he is up to date on his vaccinations. His mother reports a “blood disease” on his father’s side. His temperature is 101.0°F (38.3°C), blood pressure is 118/70 mmHg, pulse is 103/min, respirations are 18/min, and oxygen saturation is 99% on room air. A physical examination demonstrates pale conjunctiva, RUQ tenderness with positive Murphy sign, and splenomegaly. An abdominal ultrasound is shown in Figure A. Which of the following laboratory findings will confirm this patient’s diagnosis?