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Colon tumor

Polyps

Juvenile (retention) polyp


Reviewers: Jela Bandovic, M.D. (see Reviewers page)
Revised: 23 May 2012, last major update May 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Most common childhood polyp
● Usually children < 5 years, may occur in adults
● 80% in rectum
● Commonly presents with rectal bleeding (Gastroenterol Jpn 1979;14:425); polyps may autoamputate (10%) due to torsion
● Usually sporadic; rarely associated with juvenile polyposis syndrome
● Not neoplastic by itself, but may be associated with dysplasia (Arch Pathol Lab Med 1996;120:1032)

Case reports
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● 10 month old boy with intussusception (Postgrad Med 1978;64:188)
● 11 year old boy with esophageal colon interposition (J Pediatr Surg 1998;33:1418)
● With intramucosal carcinoma (Arch Pathol Lab Med 1987;111:200)

Gross description
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● Hamartomatous, large (1-3 cm) lesions with long (1-2 cm) stalks, red granular or glistening surface; may see cystic cavities

Gross images
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Prolapsing through rectum


Multiple polyps

Micro description
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● Granulation tissue and ulcer covering abundant cystically dilated glands filled with mucus in an edematous and inflamed stroma
● 20% have hyperplastic changes
● Minimal epithelium or smooth muscle; no atypia
● Rarely osseous metaplasia, foreign-body giant cell reaction to ruptured glands

Micro images
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Cystically dilated glands and inflammation #1, #2, #3, #4

Virtual slides
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Juvenile polyp

Differential diagnosis
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Inflammatory polyp

End of Colon tumor > Polyps > Juvenile (retention) polyp


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