AIMS To study the pathologic classification of gastric neuroendocrine tumors and its clinicopathologic significance. METHODS Paraffin embedded sections of 52 gastric neuroendocrine tumors including 42 carcinoid tu...AIMS To study the pathologic classification of gastric neuroendocrine tumors and its clinicopathologic significance. METHODS Paraffin embedded sections of 52 gastric neuroendocrine tumors including 42 carcinoid tumors, and 10 cases of neuroendocrine carcinoma from 326 patients who underwent resection of stomach carcinomas were studied by immunohistochemical methods including 10 endocrine markers or hormones antibodies and endocrine cells in gastric neuroendocrine tumors and extratumoral mucosa were observed under electromicroscope. RESULTS The 52 gastric neuroendocrine tumors were divided into three types: ① Gastrin dependent type of carcinoid (26 cases) accompanied by chronic atrophic gastritis (CAG) and tumor extension limited to the mucosa or submucosa complicated with hypergastrinemia and G cell hyperplasia. This type was consistently preceded by and associated with generalized proliferation of endocrine cells in the extratomoral fundic mucosa. ② Non gastrin dependent type of carcinoids (16 cases) associated with neither CAG nor hypergastrinemia. This type was more aggressive; and ③ Neuroendocrie carcinomas (10 cases), which are highly aggressive tumors. CONCLUSIONS A correct identification of different types of gastric endocrine tumors has major implications for the treatment and prognosis of the patients.展开更多
应用AgNOR染色技术对慢性表浅性胃炎(CSG)、慢性萎缩性胃炎(慢性萎缩性胃炎伴肠上皮生—CAG with IM及慢性萎缩性胃炎伴不典型增生CAG with Dys)和胃癌(GC)活检标本进行细胞核内AgNOR的定量研究。结果表明CSG组与CAG组、CAGwith IM组与G...应用AgNOR染色技术对慢性表浅性胃炎(CSG)、慢性萎缩性胃炎(慢性萎缩性胃炎伴肠上皮生—CAG with IM及慢性萎缩性胃炎伴不典型增生CAG with Dys)和胃癌(GC)活检标本进行细胞核内AgNOR的定量研究。结果表明CSG组与CAG组、CAGwith IM组与GC组、CAGwith Dys组与GC组以及CAGwithIM组与CAGwithDys组细胞核内AgNOR均数比较都有极显著差异(P<0.01)。此外,各组AgNOR颗粒大小、位置和形态分布也不同,特别是CAGwith Dys组、CAGwith IM组合分别与GC组相比较,前者在AgNOR均数、大颗粒和不规则颗粒的百分比方面均比后者更接近于GC组数值,提示慢性萎缩性胃炎伴不典型增生与胃癌发生的关系更为密切。展开更多
文摘AIMS To study the pathologic classification of gastric neuroendocrine tumors and its clinicopathologic significance. METHODS Paraffin embedded sections of 52 gastric neuroendocrine tumors including 42 carcinoid tumors, and 10 cases of neuroendocrine carcinoma from 326 patients who underwent resection of stomach carcinomas were studied by immunohistochemical methods including 10 endocrine markers or hormones antibodies and endocrine cells in gastric neuroendocrine tumors and extratumoral mucosa were observed under electromicroscope. RESULTS The 52 gastric neuroendocrine tumors were divided into three types: ① Gastrin dependent type of carcinoid (26 cases) accompanied by chronic atrophic gastritis (CAG) and tumor extension limited to the mucosa or submucosa complicated with hypergastrinemia and G cell hyperplasia. This type was consistently preceded by and associated with generalized proliferation of endocrine cells in the extratomoral fundic mucosa. ② Non gastrin dependent type of carcinoids (16 cases) associated with neither CAG nor hypergastrinemia. This type was more aggressive; and ③ Neuroendocrie carcinomas (10 cases), which are highly aggressive tumors. CONCLUSIONS A correct identification of different types of gastric endocrine tumors has major implications for the treatment and prognosis of the patients.
文摘应用AgNOR染色技术对慢性表浅性胃炎(CSG)、慢性萎缩性胃炎(慢性萎缩性胃炎伴肠上皮生—CAG with IM及慢性萎缩性胃炎伴不典型增生CAG with Dys)和胃癌(GC)活检标本进行细胞核内AgNOR的定量研究。结果表明CSG组与CAG组、CAGwith IM组与GC组、CAGwith Dys组与GC组以及CAGwithIM组与CAGwithDys组细胞核内AgNOR均数比较都有极显著差异(P<0.01)。此外,各组AgNOR颗粒大小、位置和形态分布也不同,特别是CAGwith Dys组、CAGwith IM组合分别与GC组相比较,前者在AgNOR均数、大颗粒和不规则颗粒的百分比方面均比后者更接近于GC组数值,提示慢性萎缩性胃炎伴不典型增生与胃癌发生的关系更为密切。