Year 2025 / Volume 117 / Number 2
Letter
Colonic muco-submucosal elongated polyp misdiagnosed as an inverted colonic diverticulum

108

DOI: 10.17235/reed.2024.10153/2023

Yimin Ma, Kangwei Zhang, Youhong Cao,

Abstract
Colonic muco-submucosal elongated polyp is a large intestine polyp with a long and broad stalk and a "worm-like" appearance which is covered by normal mucosa. The submucosal layer consists of edematous and fibrotic interstitium, adipose tissue, dilated blood vessels, and lymphatic follicles. Endoscopic magnification of the mucosal surface showed a uniform honeycomb pattern of regular colonic muco-submucosal elongated polyp vessels, with soft and deformable "folds" and "gyrus" at the top. The exact pathogenesis of CMSEP is still unclear.
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References
1. Matake H, Matsui T, Yao T, et al. Long pedunculated colonic polyp composed of mucosa and submucosa: proposal of a new entity, colonic muco-submucosal elongated polyp. Dis Colon Rectum. 1998;41(12):1557-61.
2. Alizart MM, Rosty C, Brown IS. Colonic mucosubmucosal elongated polyp: a clinicopathologic study of 13 cases and review of the literature. Am J Surg Pathol. 2011;35(12):1818-22.
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Ma Y, Zhang K, Cao Y. Colonic muco-submucosal elongated polyp misdiagnosed as an inverted colonic diverticulum. 10153/2023


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Publication history

Received: 09/12/2023

Accepted: 13/12/2023

Online First: 11/01/2024

Published: 05/02/2025

Article Online First time: 33 days

Article editing time: 424 days


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