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 筆者らが新しく提唱した胃癌の組織亜型・胃底腺型胃癌27病変(25患者)の臨床病理学的特徴,発育進展様式,生物学的悪性度に関して再評価した.胃底腺型胃癌は,高齢者のU領域に好発するがM領域にも存在し,胃炎のない正常胃底腺粘膜の深層部から発生し,初期には0-IIa/0-IIc型の形態をとり,小さいものでも高率にSMへ浸潤する.そして,大きくなると0-IIa+IIc型のような複合型の形態をとるものや,表層方向への増殖により隆起(0-I型)を来すものがある.悪性度に関しては,特に小さいものでは低い細胞異型,脈管浸潤陰性,低い増殖活性,p53蛋白過剰発現なし,予後良好ということより,悪性度は低いと考えられるが,比較的腫瘍径が大きく異型がより高度のものでは,脈管浸潤やCD10陽性成分が出現しているものもあり,進行するにつれて異型度や細胞分化の変化が生じ,高悪性度へと変化する可能性が示唆された.
We re-evaluated clinicopathological features including tumor development and biological behavior of 27 lesions from 25 patients of gastric adenocarcinoma of the fundic gland type(GA-FG), which we have newly proposed.
GA-FG has tended to occur in the upper third of the stomach(fundus)of seniors, but it also occurs in the middle of the stomach(corpus). GA-FG generates at the deep portion of normal fundic mucosa and takes on the configuration of 0-IIa/0-IIb/0-IIc initially. Even a small lesion invades the submucosa(SM). Some larger ones can take on the complex configurations such as 0-IIa+IIc or can grow in a polypoid lesion(0-I)with of mucosal involvement of full-thickness.
With regard to biological behavior,GA-FG, especially in the case of small ones, is considered to be of low-grade malignancy because of its low cellular atypia, no lymphovascular invasion, low proliferating activity, lack of p53 protein overexpression and good prognosis, but it is also suggested that some cases of GA-FG can transform into high-grade malignancy with high cellular atypia, lymphovascular invasion and the presence of CD10 positive components during progression.
Copyright © 2010, Igaku-Shoin Ltd. All rights reserved.