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?
AColonoscopy
BTechnetium-99m pertechnetate scan
CCapsule endoscopy
DAbdominal CT with contrast
ETagged red blood cell study
During a surgical procedure to repair an abdominal aortic aneurysm, the surgeon must be careful to avoid injury to which of the following arterial structures that originates near the level of the renal vessels?
ALeft renal artery
BCeliac trunk
CRight renal artery
DSuperior mesenteric artery
A 2-year-old male is brought to his pediatrician by his mother because of abdominal pain and blood in the stool. Scintigraphy reveals uptake in the right lower quadrant of the abdomen. Persistence of which of the following structures is the most likely cause of this patient's symptoms?
AUreteric bud
BUrachus
CParamesonephric duct
DOmphalomesenteric duct
EAllantois
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