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Anatomy Practice MCQs

Browse 15,053 high-yield clinical questions in Anatomy. Includes detailed explanations, options, and topic tags.

#885 General

A 5-year-old child is brought to the emergency room with massive, painless bleeding from the rectum. Colonoscopy fails to demonstrate a lesion in the colon or anus. Upper endoscopy fails to demonstrate esophagitis, gastric ulcer or duodenal ulcer. A 99mTc (technetium) scan demonstrates an abnormality in the lower half of the abdomen. Failure of a normal developmental process involving which of the following structures is the most likely cause of this child's bleeding?

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