Japanese
English
- 有料閲覧
- Abstract 文献概要
- 1ページ目 Look Inside
- 参考文献 Reference
- サイト内被引用 Cited by
要旨 当診療部で内視鏡的切除を施行した大腸鋸歯状腺腫(serrated adenoma;SA)499病変を対象に,肉眼型(隆起型328病変,表面型171病変)別に内視鏡所見を比較検討した.平均腫瘍径は,表面型SAが隆起型SAより有意に大きかった.通常内視鏡像では,隆起型SAは発赤調で顆粒結節状および分葉状,表面型SAは褪色調で表面が平滑な所見が特徴的であった.拡大観察では,隆起型SAはIIILまたはIV型pit patternを呈することが多かったのに対し,表面型SAはすべてII型(95%はII型単独)を呈していた.NBI拡大観察では,隆起型SAは微小血管径が均一型,微小血管模様整が66.7%,表面型SAは微小血管径と微小血管模様がすべて不明瞭であった.また,表面型SAは過形成性病変の内視鏡像と類似しており,両者を厳密に鑑別診断することは困難であると考えられた.
We assessed endoscopic findings for diagnosis of colorectal serrated adenoma (SA). SAs were divided into two types based on their macroscopic appearance: polypoid and superficial. Superficial SAs tended to be white like the adjacent non-neoplastic mucosa. Granulonodular and lobular appearance was significantly more common for polypoid SAs than for superficial SAs. The pit patterns of all SAs were classified into 3 types : type II only, mixed type (type II only, mixed IIIL or IV), type IIIL or IV only. All superficial SAs exhibited the type II pit pattern. With NBI magnification, invisible capillaries were found in superficial SAs. We conclude that polypoid and superficial SAs present different endoscopic findings. However, using colonoscopic observation, it is difficult to distinguish most small, superficial SAs from hyperplastic lesions.
Copyright © 2007, Igaku-Shoin Ltd. All rights reserved.