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Pediatrics · Gastroenterology: Meckel diverticulum
Sample itemA 2-year-old has painless, large-volume rectal bleeding. Which investigation is most useful?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Technetium-99m pertechnetate scan
Meckel diverticulum follows the rule of 2s: 2 percent of the population, 2 feet from the ileocaecal valve, 2 inches long, and presents under 2 years. Bleeding comes from ectopic gastric mucosa, which takes up pertechnetate. Treatment is surgical resection.
Option by option
A. Upper GI endoscopy
Upper endoscopy does not see the ileum.
B. Barium enema
Barium enema is not the test of choice.
C. Stool culture
Stool culture does not explain painless bleeding.
D. Technetium-99m pertechnetate scan (correct)
Correct. The scan detects ectopic gastric mucosa.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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