Gastroenterology Q 60

A 55-year-old man is evaluated at follow-up for iron deficiency anemia and positive result on stool guaiac testing. Despite excellent preparation and visualization, upper endoscopy and colonoscopy performed last week did not find the source of bleeding. He has no melena, hematochezia, or localizing symptoms. He has no other medical conditions and takes no medications. Vital signs and other findings on physical examination are normal.

Which of the following is the most appropriate diagnostic test to perform next?

A CT angiography

B Barium small-bowel follow-through

C Tagged red cell scintigraphy

D Video capsule endoscopy

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