Two cases of inverted hyperplastic polyps of the colon and association with adenoma.

Abstract:

:Here we report two cases of inverted hyperplastic polyps of the colon. The first patient showed three inverted hyperplastic polyps in the ascending colon, one of which was associated with adenoma. We immunostained this adenoma-associated polyp using anti-beta-catenin antibody and found accumulation of beta-catenin in the cytoplasm of the adenomatous lesion but not in the inverted hyperplastic polyp. This suggested an adenomatous polyposis coli (APC) mutation in the adenomatous region but not in the inverted hyperplastic polyp. The inverted hyperplastic polyp in the second patient was located at the caecum and was studied using magnifying colonoscopy. The polyp appeared to be flat and elevated with a depressed pit in the centre. After spraying with methylene blue dye, the pit pattern of the lesion was observed and small asteroid pits on the polyp were found, consistent with a hyperplastic gland pattern. From these results, we diagnosed inverted hyperplastic polyp of the colon by colonoscopy.

authors

Kuribayashi K,Ishii T,Ishidate T,Ban N,Hirata Y,Hashida H,Saito K,Iwashiro N,Ohara M,Ishizaka M,Azumad M,Hayashi T,Takayama T

doi

10.1097/00042737-200401000-00016

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

107-12

issue

1

eissn

0954-691X

issn

1473-5687

journal_volume

16

pub_type

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