A 66-yo woman with hx of IDDM presented with pancreatitis of unknown etiology. After restarting enteral nutrition on day 13, she developed watery diarrhea. On day 21, she excreted per anus a 49-cm long vermiform strand with a central lumen. What is it?
Ascaris lumbricoides
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Acholic stool
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Ribbon-like stool due to colon cancer
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Taenia saginata
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Colonic cast due to ischemic bowel
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