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A 2-year-old boy presents to the emergency department with the complaint of acute onset abdominal pain and vomiting. Upon further questioning you find the patient has no past medical history except for occasional painless rectal bleeding the past couple of weeks. Physical exam is significant for an 8/10 sharp pain in the right lower quadrant. Bowel sounds are hyper-active. Laboratory analysis reveals a white blood cell count of 11,000 per mcL. Nuclear imaging is performed and can be seen in Figure A. What is the likely underlying medical condition that lead to this patient's clinical presentation?
Diabetic ketoacidosis (DKA)
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A 14-month-old boy has iron-deficiency anemia refractory to iron therapy. His stool is repeatedly positive for occult blood. The parents bring the child to the emergency room after they notice some blood in his stool. Which of the following is the diagnostic gold standard for this patient's most likely condition?
Abdominal CT with contrast
Tagged red blood cell study
Technetium-99m pertechnetate scan