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Stomach

Polyps

Gastritis cystica polyposa


Reviewers: Elliot Weisenberg, M.D. (see Reviewers page)
Revised: 8 August 2012, last major update August 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Hyperplastic polyp containing foveolar or glandular epithelium in submucosa or muscularis propria
● Also called polypoid mucosal prolapse

Gross description
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● Usually on gastric side of gastroenterostomy stomas
● Large sessile polyp grossly resembling hyperplastic polyp

Micro description
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● Resembles gastric hyperplastic polyp and reflux gastritis with pit hyperplasia, distortion, dilation
● May contain submucosal cysts surrounded by disorganized smooth muscle
● Increased mixed inflammatory cells in lamina propria

Micro images
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Elongated, tortuous foveolae and hyperplastic and cystically dilated underlying pyloric gland


Gastritis cystica profunda with deep misplaced glands

Differential diagnosis
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● Well differentiated adenocarcinoma: desmoplasia, atypical mitoses; absence of lamina propria surrounding glands points to malignancy

End of Stomach > Polyps > Gastritis cystica polyposa


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