Review Question - QID 215082

A 14-year-old girl is brought to the pediatric emergency department by her father due to worsening nausea, vomiting, and abdominal pain that began over the last day. Yesterday, she was feeling more tired than usual and found herself falling asleep in class. Early this morning, she awoke in the middle of the night with nausea and has been vomiting since. She also reports cramping abdominal pain that is 10/10 in severity. She has no known past medical history and takes no medications. Temperature is 99°F (37.2°C), blood pressure is 102/53 mmHg, pulse is 110/min, and respirations are 26/min. On exam, she is lethargic and mucous membranes are dry. She is oriented to person only. The abdomen is tender throughout without rebound tenderness. Blood glucose is measured as 268 mg/dL. Which of the following is most likely in this patient?