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Juvenile polyposis is an uncommon condition characterized by development of multiple juvenile polyps, predominantly in the colon but also in the rest of the gastrointestinal tract. The condition usually appears in childhood. The rarer and often fatal form, occurring in infancy, is typified by diarrhea, protein-losing enteropathy, bleeding, and rectal prolapse. The more common form of juvenile polyposis (affecting the colon, stomach, and small bowel) occurs in the first or second decade with rectal bleeding and anemia. We report a case of juvenile polyposis detected on sonography, which had been treated as severe anemia for 1 year.
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