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Gastric pyloric gland adenoma.

胃幽门腺腺瘤

Abstract

Pyloric gland adenomas are rare neoplasms of the gastrointestinal tract. Gastric pyloric gland adenomas have been shown to arise in chronically damaged mucosa. The neoplastic glands have gastric pyloric gland differentiation and have a tightly packed organization with occasional cystic dilatation. The individual cells are cuboidal to columnar, with eosinophilic to amphophilic cytoplasm and either no apical mucin cap or a poorly formed apical mucin cap. The nuclei are round to oval, with occasional prominent nucleoli. Immunohistochemically, the neoplastic cells label with markers of gastric pyloric gland differentiation, including MUC6 and MUC5AC. There is limited information regarding the natural history of pyloric gland adenomas, but clinical series have described adenocarcinomas in association with gastric pyloric gland adenomas. The ideal clinical management is adequate sampling of the lesion to investigate for high-grade dysplasia and/or invasive cancer and recommendation to clinical colleagues to investigate the background mucosa for the etiology of chronic gastritis as well as potential additional neoplastic lesions. This review will focus on gastric pyloric gland adenomas.

摘要

幽门腺腺瘤是胃肠道罕见肿瘤。胃幽门腺腺瘤已被证实起源于慢性损伤粘膜。肿瘤性腺体显示胃幽门腺分化并排列紧密,偶有囊性扩张。肿瘤细胞是立方形-柱状,胞浆嗜酸性-嗜双色性,无顶浆粘蛋白帽或粘蛋白帽形成不良。细胞核圆形或卵圆形,偶有突出的核仁。免疫组织化学染色,肿瘤细胞表达胃幽门腺分化标记物,包括MUC6和MUC5AC。有关于幽门腺腺瘤的自然病程认识有限的,但临床系列报道描述了腺癌与胃幽门腺腺瘤相关。临床理想的治疗是对病变进行适当活检,明确有无高度不典型增生和/或浸润性癌,并建议临床医生明确背景黏膜慢性胃炎的病因,以及有无潜在的其它肿瘤性病变。本文针对胃幽门腺腺瘤进行综述。
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