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Multicenter Study
. 1996 Aug;87(8):849-55.
doi: 10.1111/j.1349-7006.1996.tb02110.x.

Histologic classification of endoscopically removed flat colorectal polyps: a multicentric study

C A Rubio  1 , Y Kato, T Hirota, T Muto
Affiliations
Multicenter Study

Histologic classification of endoscopically removed flat colorectal polyps: a multicentric study

C A Rubio et al. Jpn J Cancer Res. 1996 Aug.

Abstract

A total of 594 flat colorectal polyps, removed at endoscopy, were histologically classified into non-neoplastic (n = 49) and neoplastic (n = 545) polyps. Non-neoplastic polyps were subdivided into metaplastic (n = 45) and hyperplastic (n = 4), whereas neoplastic polyps were subdivided into adenomas (n = 481), intramucosal carcinomas (n = 28) and invasive adenocarcinomas (n = 36). Several adenoma phenotypes were discerned: tubular (n = 375), serrated (n = 59), villous (n = 39), mixed (n = 7) and fenestrated (n = 1). Intramucosal carcinomas were subdivided into tubular (n = 26) and serrated (n = 2), and invasive adenocarcinomas into tubular (n = 32), serrated (n = 3) and fenestrated (n = 1). The microscopic characteristics of each histologic phenotype described in this communication are defined and illustrated.

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